Baca Fuentes, J.R.; Perez Gutierrez, E.; Galina Hidalgo, C.S. (1998) Reproductive performance of Bos taurus x Bos indicus heifers following artificial insemination after spontaneous estrus in the dry tropics of Costa Rica. [Comportamiento reproductivo de novillas Bos taurus x Bos indicus inseminadas artificialmente a estro natural en el tropico seco de Costa Rica.] Veterinaria Mexico 29 (1): 57-66, ISSN: 0301-5092.

NAL Call Number: SF604.V485

Keywords: heifers, crossbreeding, bos taurus x bos indicus, artificial insemination, estrus detection, reproductive performance, Spanish language, Costa Rica.


Bailey, J.D.; Rhinehart, J.D.; Anderson, L.H.; Schillo, K.K. (2002). Repeated exposure to novel females enhances sexual behavior of bulls. Journal of Dairy Science 85 (Suppl. 1): 201, ISSN: 0022-0302.

NAL Call Number: 44.8 J822

Keywords: estradiol cypionate, diestrus, estrus, intromission, mounting, novel female exposure, sexual behavior.


Baker, D.S.; Engle, T.E.; Whittier, J.C.; Burns, P.D.; Mortimer, R.G.; Schutz, D.N.; Enns, M. (2002). Trace mineral impact on reproductive performance, immune response and calf performance in grazing beef cattle. Journal of Animal Science 80 (Suppl. 2): 117, ISSN: 0021-8812.

NAL Call Number: 49 J82

Keywords: calf, crossbred beef cow, female, heifer, liver, IgG, dietary supplement, copper, manganese, zinc, humoral immune response, reproductive performance.


Bellin, M.E.; Oyarzo, J.N.; Hawkins, H.E.; Zhang, H.M.; Smith, R.G.; Forrest, D.W.; Sprott, L.R.; Ax, R.L. (1998). Fertility-associated antigen on bull sperm indicates fertility potential. Journal of Animal Science 76 (8): 2032-2039, ISSN: 0021-8812.

NAL Call Number: 49 J82

Keywords: bulls, Santa Gertrudis, breed, male fertility, 30-kDa heparin-binding protein, fertility-associated antigen, spermatozoa, membranes, sexual behavior.


Blume, H.; Segundo, J.M. (2001). Reproductive behavior of beef cattle in Maranhao state. [Comportamento reprodutivo de bovinos de corte no Maranhao.] Revista Brasileira de Reproducao Animal 25 (2): 125-127, ISSN: 0102-0803.

NAL Call Number: QP251 R48

Keywords: Nelore or Nelore crossed animals, extensive system, Brachiaria brizanthec and humidicola, Andropogan gayanus and Lageado (Hyparrhneia rufa), artificial pastures, conception rate, parturition, pasture, reproductive behavior, weaning age, Brazil, Portuguese language.


Burke, J.M.; Spiers, D.E.; Kojima, F.N.; Perry, G.A.; Salfen, B.E.; et al. (2001). Interaction of endophyte-infected fescue and heat stress on ovarian function in the beef heifer. Biology of Reproduction 65 (1): 260-268.

NAL Call Number: QL876 B5

Keywords: heifers, graafian follicles, corpus luteum, estrous cycle, synchronized females, festuca arundinacea, seed contamination, endophytes, mycotoxicoses, heat stress, interactions, blood serum, prolactin, cholesterol, progesterone, estradiol, fescue toxicosis.


Burnham, D.L.; Morris, S.T.; Purchas, R.W.; McCutcheon, S.N. (1997). Effect of Compudose and Rumensin, alone or in combination, on the growth, and carcass and meat quality of steers finished on pasture. New Zealand Journal of Agricultural Research 40 (2): 231-238, ISSN: 0028-8233.

NAL Call Number: 23 N4892

Keywords: compudose, rumensin, monensin sodium, estradiol, 17 beta, feed additives, hormonal growth promotant, live weight gain, effects on, carcass quality, meat quality, m. longissimus, meat brightness, warner, bratzler peak shear value, New Zealand.


Cannell, R.C.; Belk, K.E.; Tatum, J.D.; Wise, J.W.; Chapman, P.L; Scanga, J.A.; Smith, G.C. (2002). Online evaluation of a commercial video image analysis system (Computer Vision System) to predict beef carcass red meat yield and for augmenting the assignment of USDA yield grades. Journal of Animal Science 80 (5): 1195-1201, ISSN: 0021-8812.

NAL Call Number: 49 J82

Keywords: Computer Vision System, commercial video image, analysis system, evaluation method, online evaluation, USDA yield grades, carcass red meat yield.


Casass, I.; Sanz, A.; Bernu s, A.; Ferrer, R.; Revilla, R. (2001). Weight change and energy supply of pasture in suckler cows under mountain conditions: effect of calving season. [Variaci n de peso y aporte energ tico del pasto en vacas de cr a en condiciones de monta a: efecto de la poca de parto.] Investigacion Agraria. Produccion y Sanidad Animales 16(1): 109-125, ISSN: 0213-5035.

NAL Call Number: SF15 S7A52

Keywords: suckler cows, beef cattle, parturition, grazing, body weight, livestock management, animal feeding, reproduction.


Charmley, E.; Wichtel, J.; Richardson, G.; Lofstedt, R. (2002). The interaction between plane of nutrition and success of estrus synchronization using two methods. Journal of Dairy Science 85 (Suppl. 1): 206, ISSN: 0022-0302.

NAL Call Number: 44.8 J822

Keywords: gonadotropin releasing hormone, fertilitydrug, estradiol benzoate, intramuscular administration, progesterone, intravaginal device, drug delivery system, fertility drug, breeding method, estrus synchronization, Ovsynch, body weight, energy nutrition, estrus success, plane of nutrition correlation, parity, silage, animal feed, winter calving.


Chenoweth, P.J.; Vargas, C.A.; Rae, D.O.; Saltman, R.L.; Genho, P.C.; Crosby, G. (1997). Effects of an oral antibiotic on fertility traits in range beef cows in Florida. Journal of Animal Science 75 (Suppl. 1): 249, ISSN: 0021-8812.

NAL Call Number: 49 J82

Keywords: Simmental x Brahman, Angus x Brahman, Hereford x Brahman, crossbred cows, chlortetracycline, antibiotic, fertility traits, oral antibiotic effects.


Correa, E.S.; de Andrade, P.; Euclides, F.K.; Alves, R.G. (2000). Evaluation of a Beef Cattle production system. 1. Reproductive performance. [Avaliacao de um Sistema de Producao de Gado de Corte. 1. Desempenho Reprodutivo.] Revista Brasileira de Zootecnia 29 (6 Suppl. 2): 2209-2215.

NAL Call Number: SF1 R45

Keywords: heifers, cows, grazing, reproductive performance data, first calving, pregnancy rate, calf loss rate, reconception rate, sex effects, total herd loss rate, Portuguese language.


Costa e Silva, E.V.; Faria, C. L.; Santos, A. M.; Poleto, I.C.B.; Bezerra, A. C. (2000). An evaluation of the basic costs of different techniques of preparation of bovine teasers, Brazil. [Avaliacao dos custos basicos de diferentes tecnicas de preparacao de rufioes bovinos no Brasil.] Revista Brasileira de Reproducao Animal 24 (2): 90-100, ISSN: 0102-0803.

NAL Call Number: QP251 R48

Keywords: beef cattle, castration, cows, epididymis, surgery, vasectomy, bulls, costs, teasing, animal husbandry, estrus, Portuguese language, Brazil.


Drew, K.B. (1999). Protocols for combined use of progestogen and prostaglandin in dairy and beef cattle. Cattle Practice 7 (1): 79-84, ISSN: 0969-1251.

NAL Call Number: SF961 C37

Keywords: beef cattle, dairy cattle, cows, prostaglandins, progestogens, fertility, female fertility, estrus cycle, pregnancy rate, reviews, reproduction, biotechnology.


Ducrot, C.; Grohn, Y.T.; Bugnard, F.; Senlis, Y.; Sulpice, P.; Gilbert, R.O. (1999). A field study on estrus detection in lactating beef cattle. Veterinary Research 30 (1): 87-98, ISSN: 0928-4249.

NAL Call Number: SF602 A5

Keywords: lactating beef cows, estrus, artificial insemination, tie stalls, calving, progesterone, animal housing, lactation, postpartum interval, France.


Geary, T.W.; Whittier, J.C.; Hallford, D.M.; MacNeil, M.D. (2001). Calf removal improves conception rates to the Ovsynch and CO, Synch protocols. Journal of Animal Science 79 (1): 1-4, ISSN: 0021-8812.

NAL Call Number: 49 J82

Keywords: beef cows, breed, postpartum interval, age, sire, synchronization of ovulation, Ovsynch protocol, calf removal, GnRH injection, blood samples, serum progesterone, conception rates.


Gordon, I. (1996). Controlled Reproduction in Cattle and Buffaloes CAB International: Wallingford, UK, 492 p., ISBN: 0851991149.

NAL Call Number: SF201 G67 1996

Keywords: literature review, reproduction, estrous cycle, artificial control of estrus and ovulation, pregnancy testing, control of calving, reducing the calving interval, embryo transfer, in vitro fertilization, controlled breeding in buffaloes, embryo transfer and in vitro fertilization in buffaloes.


Grimard, B.; Bonnet, A.; Ponsart, C.; Rosso, V.; Humblot, P. (1998). Influence of the number of artificial inseminations after oestrus synchronization treatment on fertility rate in suckled Charolais beef cows. [Effet du nombre d’inseminations a l’oestrus induit sur la fertilite de vaches allaitantes charolaises synchronisees.] Elevage et Insemination 286: 3-10, ISSN: 0422-9703.

NAL Call Number: 43.8 EL22

Keywords: cows, oestrus synchronization, artificial insemination, fertility, reproductive performance, French language.


Grimard, B.; Marie Nely, F.; Valiergue, H.; Humblot, P. (1998). Group management of beef cows. [Conduite en bandes de vaches allaitantes.] Elevage et Insemination 284: 3-13, ISSN: 0422-9703.

NAL Call Number: 43.8 EL22

Keywords: cows, animal husbandry methods, estrus synchronization, reproduction control, reproductive performance, French language.


Holloway, J.W.; Warrington, B.G.; Forrest, D.W.; Randel, R.D. (2002). Preweaning growth of F SUB 1 tropically adapted beef cattle breeds x Angus and reproductive performance of their Angus dams in arid rangeland. Journal of Animal Science 80 (4): 911-918, ISSN: 0021-8812.

NAL Call Number: 49 J82

Keywords: Brahman, Senepol, Tuli, Angus, breed, preweaning performance, calves, adaptation, growth, weight gain, genotype environment interaction, performance evaluation, meat production, reproductive performance, comparative study, Texas, semi arid zone, tropical zone.


Imwalle, D.B.; Daxenberger, A.; Schillo, K.K. (2002). Effects of melengestrol acetate on the reproductive behaviour and concentrations of LH and testosterone in bulls. Journal of Animal Science 80 (4): 1059-1067, ISSN: 0021-8812.

NAL Call Number: 49 J82

Keywords: beef cattle, bulls, crossbred, blood plasma, luteinizing hormone, male fertility, melengestrol, progestogens, reproductive behavior, sexual behavior, flehmen, mounting, testosterone.


Imwalle, D.B.; Fernandez, D.L.; Schillo, K.K. (2002). Melengestrol acetate blocks the preovulatory surge of luteinizing hormone, the expression of behavioral estrus, and ovulation in beef heifers. Journal of Animal Science 80 (5): 1280-1284, ISSN: 0021-8812.

NAL Call Number: 49 J82

Keywords: beef cattle, Angus, breed, heifers, luteinizing hormone, melengestrol, estrus behavior, ovulation, pharmacology, progesterone, reproduction, synchronization, synthetic progestogens.


Ingrand, S.; Dedieu, B. (1996). Diversity of batch management in rearing beef cattle: Limousin herds. [Diversite des formules d’allotement en elevage bovin viande. Le cas d’exploitations du Limousin.] Productions Animales 9 (3): 189-199, ISSN: 0990-0632.

Keywords: cows, Limousin, breed, female fertility, management, suckler herds, calving interval, France.


Jaume, C.M.; Souza, C.J.H; Moraes, J.C.F. (2001). Some factors that affect the fertility of beef cows in extensive production systems. [Alguns fatores que afetam a fertilidade de vacas de corte em sistemas extensivos.] Revista Brasileira de Reproducao Animal 25 (2): 122-125, ISSN: 0102-0803.

NAL Call Number: QP251 R48

Keywords: beef cattle cows, body condition score, calving, climate, synchronization of estrus, fertility, pasture availability, pregnancy rate, Brazil, Portuguese language.


Jubb, T.F.; Fordyce, G.; Bolam, M.J.; Hadden, D.J.; Cooper, N.J.; Whyte, T.R.; Fitzpatrick, L.A.; Hill, F.; D”Occhio, M.J. (2003). Trial introduction of the Willis dropped ovary technique for spaying cattle in northern Australia. Australian Veterinary Journal 81 (1/2): 66-70, ISSN: 0005-0423.

NAL Call Number: 41.8 Au72

Keywords: beef cattle, Brahman, Brahman-Shorthorn, crossbred, female, heifer, Willis dropped ovary technique, ovariectomy, traditional paralumber spaying, traditional vaginal spaying method, animal welfare, body condition, body weight, mortality, pregnancy, Australia.


Kammerling, J. (2002). Investigations on the Assessment and Control of Beef Cattle Parturition [Untersuchungen zur Bewertung und Beeinflussung von Geburten bei Mutterkuhen], Freie Universitat Berlin: Berlin, Germany, 113p.

Keywords: beef cattle, calves, calving, dystocia, oxytocin, pharmacology, reproduction, stress factors, thesis, German language, Berlin, Germany.


Kastelic, J.P.; Cook, R.B.; Pierson, R.A.; Coulter, G.H. (2001). Relationships among scrotal and testicular characteristics, sperm production, and seminal quality in 129 beef bulls. Canadian Journal of Veterinary Research 65 (2): 111-115, ISSN: 0830-9000.

NAL Call Number: SF601 C24

Keywords: crossbred beef bulls, 16 months old. breeding soundness examinations, measurement of scrotal surface temperature (SST), internal/scrotal testicular temperatures, testicular ultrasonographic echotexture, daily sperm production, epididymal sperm reserves,linear correlations, regression analysis.


Kunkle, W.E. (1998). Higher pregnancy rates with better body condition. Large Animal Practice 19 (1): 8-10, ISSN: 1092-7603.

NAL Call Number: SF601 B6

Keywords: beef, cow, productivity, management, body condition, pregnancy rate.


Lamb, G.C.; Dahlen, C.R. (2002). Past, present, and future impact of ultrasound technology on beef cattle reproductive research and management strategies. Journal of Animal Science 80 (Suppl. 2): 85, ISSN: 0021-8812.

NAL Call Number: 49 J82

Keywords: corpus luteum, endocrine system, reproductive system, follicle atresia, GnRH, IGF-binding proteins, androstenedione, estrogen, inhibin, progesterone, ultrasonography, imaging method, visualization method, CoSynch estrous synchronization system, early embryonic detection, fetal sexing, large animal reproduction, pregnancy rates, reproductive management strategies.


Lane, E.A.; Austin, E.J.; Roche, J.F.; Crowe, M.A. (2001). The effect of estradiol benzoate on synchrony of estrus and fertility in cattle after removal of a progesterone-releasing intravaginal device. Theriogenology 55 (9): 1807-1818, ISSN: 0093-691X.

NAL Call Number: QP251.A1T5

Keywords: heifers, estradiol benzoate, progesterone-releasing intravaginal device (PRID), follicular development, ultrasonography, onset of estrus, estrus synchrony, fertility, pregnancy rates.


Larson, R.L. (1999). Evaluating information obtained from pregnancy examinations in beef herds. Veterinary Medicine 94 (6): 566-573, 575-576.

NAL Call Number: 41.8 M69

Keywords: beef herds, pregnancy rate, data analysis, cattle husbandry, breeding season, reproductive disorders.


Lehr, A. (1997). Etho-physiological reactions in mother cows and their calves during the peripartal period. [Verhaltensphysiologische Reaktionen bei Mutterkuehen und ihren Kaelbern im peripartalen Zeitraum.] In: 3. Trenthorster Kolloquium, Workshop on Rearing of Cattle with Suckler Calves (Mutterkuhhaltung) as Extensive Rearing System. Studies on Appropriate and Environmentally Friendly Animal Husbandry, Dec. 5-6, 1996 Trenthorst, Germany. [Workshop Ueber Die Haltung von Rindern Mit Saugkaelbern (Mutterkuhhaltung) Als Extensive Tierhaltungsform. Studien Zur Artgerechten Und Umweltfreundlichen Tierhaltung.] FAL: Braunschweig-Voelkenrode, Germany, pp. 138-148, Series title, Landbauforschung Voelkenrode. Sonderheft (Germany), no. 177, ISSN: 0376-0723.

NAL Call Number: 18 L2352 Suppl.

Keywords: beef cattle cows, mothers, calves, behavior, heart rate, movement, parturition, Germany, European Union, German language.


Lourens, D.C.; Thompson, P.N.; Bertschinger, H.J.; Ameen, M. (2002). Evaluation of oestrus observation and conception rates in suckling beef cows using whole milk progesterone concentration. Journal of the South African Veterinary Association 73 (4):190-194, ISSN: 1019-9128.

NAL Call Number: 41.8 So8

Keywords: cow, female, suckling, progesterone concentration, estrus indicator, artificial insemination, conception rate, optimal nutrition, intensive management.


Maracek, I. (2000). Management of reproduction in beef cow herds without market production of milk. [Riadenie reprodukcie v chovoch krav bez trhovej produkcie mlieka.] Slovensky Veterinarsky Casopis 25 (1): 22-27, ISSN: 1335-0099.

Keywords: cows, reproduction, beef cattle, calving interval, heifers, mating, parturition, puerperium, reproductive organs, service period, postpartum interval, animal husbandry, reproductive performance, Slovakian language.


Marsalek, M.; Frelich, J.; Zednikova, J. (1997). Growth of beef breeds calves born from natural mating and artificial insemination. Sbornik Jihoceska Univerzita Zemedelska Fakulta Ceske Budejovice Zootechnicka Rada 14 (1): 11-21, ISSN: 1210-6240.

Keywords: calves, cows, bulls, Angus, Simmental, breed, mating, natural, artificial insemination, calf live weight, average daily gain, growth, heredity testing, Czech language.


Martinez, M.F.; Kastelic, J.P.; Adams, G.P.; Cook, B.; Olson, W.O.; Mapletoft, R.J. (2002). The use of progestins in regimens for fixed-time artificial insemination in beef cattle. Theriogenology 57 (3): 1049-1059, ISSN: 0093-691X.

NAL Call Number: QP251.A1T5

Keywords: beef cattle, heifers, estradiol benzoate, melengestrol acetate, gonadotropin releasing hormone, prostaglandin, progesterone, dosage, fertility drug, Co-Synch estrous synchronization, Ovsynch estrous synchronization, assisted reproduction method, fixed time artificial insemination, lactation, pregnancy rate.


Martinez, M.F.; Kastelic, J.P.; Adams, G.P.; Mapletoft, R.J. (2001). The use of GnRH or estradiol to facilitate fixed-time insemination in an MGA-based synchronization regimen in beef cattle. Animal Reproduction Science 67 (3/4): 221-229, ISSN: 0378-4320.

NAL Call Number: QP251.A5

Keywords: crossbred beef cattle, pregnancy rates, GnRH or estradiol admisnistration, melengestrol acetate (MGA) based estrus synchronization program, fixed-time insemination.


Mathew, S.R.; McCaughey, W.P.; Kennedy, A.D.; Lewis, N.J.; Crow, G.H. (1999). Electronic monitoring of mounting behavior in beef cattle on pasture. Canadian Veterinary Journal 40 (11): 796-798, ISSN: 0008-5286.

NAL Call Number: 41.8 R3224

Keywords: crossbred beef cows, monitoring, conception rate, automated heatmount detection system, estrus, detection, diurnal changes, pregnancy, pregnancy rate, Manitoba, Canada.


Matondang, R.H.; Bestari, J.; Siregar, A.R.; Panjaitan, H. (1999). Analysis of beef cattle mother rearing on IB (Artificial Insemination) program in Agam (Indonesia). [Analisis usaha pemeliharaan induk sapi potong pada program IB di Kabupaten Agam.] In: Guide Book for National Seminar on Animal Husbandry and Veterinary. [Buku Panduan Seminar Nasional Peternakan Dan Veteriner.] Puslitbangnak: Bogor, Indonesia, p. 66.

Keywords: beef cattle husbandry, calf production, reproduction, artificial insemination, Indonesian language, Indonesia.


Miettinen, P. (1996). Effects of nutrition of reproduction (fertility and infertility) of dairy and beef cattle. Bovine Practitioner 0 (30): 62-66, ISSN: 0524-1685.

NAL Call Number: SF779.5 A1B6

Keywords: breeding, dairy production, energy metabolism, feed efficiency, feeding, fertility, infertility, meeting paper, nutrition, reproduction.


Moerchen, F.M. (1997). Herd management during the perinatal period. [Herdenbewirtschaftung im perinatalen Zeitraum.] In: 3. Trenthorster Kolloquium, Workshop on Rearing of Cattle with Suckler Calves (Mutterkuhhaltung) as Extensive Rearing System. Studies on Appropriate and Environmentally Friendly Animal Husbandry, Dec. 5-6, 1996 Trenthorst, Germany. [Workshop Ueber Die Haltung von Rindern Mit Saugkaelbern (Mutterkuhhaltung) Als Extensive Tierhaltungsform. Studien Zur Artgerechten Und Umweltfreundlichen Tierhaltung.] FAL: Braunschweig-Voelkenrode, Germany, pp. 213-223, Series title, Landbauforschung Voelkenrode. Sonderheft (Germany), no. 177, ISSN: 0376-0723.

NAL Call Number: 18 L2352 Suppl.

Keywords: beef cattle cows, mothers, calves, animal husbandry, animal feeding, nutritional requirements, energy, proteins, parturition, parturition complications, obstetrics, maternal behavior, Germany, European Union, German language.


Musofie, A.; Wardhani, N.K.; Lestari, S.B. (1998). Assessment on beef cattle husbandry with artificial insemination technology in Daerah Istimewa Yogyakarta (Indonesia). Pengkajian sapi potong dengan teknologi inseminasi buatan di Daerah Istimewa Yogyakarta.] In: Proceedings of Scientific Seminar and Workshop of Technology on Specific Location for Agricultural Developing with Agrobusiness Orientation. [Prosiding Seminar Ilmiah Dan Lokakarya Teknologi Spesifik Lokasi Dalam Pengembangan Pertanian Dengan Orientasi Agribisnis.] Instalasi Penelitian dan Pengkajian Teknologi Pertanian: Yogyakarta, Indonesia, pp. 217-228, ISBN: 979-9007-09-7.

Keywords: artificial insemination, farmers, feeding, reproductive performance, animal husbandry methods, Indonesian language, Indonesia.


Naazie, A.; Makarechian, M.; Hudson, R.J. (1999). Evaluation of life, cycle herd efficiency in cow, calf systems of beef production. Journal of Animal Science 77 (1): 1-11, ISSN: 0021-8812.

NAL Call Number: 49 J82

Keywords: breed, beef synthetic 1, beef synthetic 2, dairy synthetic, Hereford, beef efficiency model, production, cow culling, cow, calf systems, life, cycle herd efficiency, reproductive performance.


Nicks, B.; Desiron, A.; Vandenheede, M.; Canart, B. (1999). Incidence of the caesarean on the Belgian White and Blue cows and calves behaviour. [Incidences de la cesarienne sur le comportement des vaches et de leur veau en race Blanc Bleu Belge.] Elevages Belges 52 (7/8): 14-17, ISSN: 0770-2216.

Keywords: calves, caesarean section, maternal behavior, milking, animal husbandry methods, surgical operations, French language.


Nishigai, M.; Kamomae, H.; Tanaka, T.; Kaneda, Y. (1999). The influence of developmental stage and morphological quality of frozen, thawed bovine embryos on pregnancy rate in bovine embryo transfer. Journal of Reproduction and Development 45 (4): 301-306, ISSN: 0916-8818.

NAL Call Number: SF1.K3

Keywords: heifers, Holstein, Japanese Black, breed, blastocyst, female, morula, embryo frozen, thawed embryo transfer, embryo transfer method.


Oliveira, J.F.C. de; Neves, J.P.; Moraes, J.C.F.; Gon alves, P.B.D. (2002). Characterization of productive aspects in Brangus Ibage cows with distinct levels of fertility (Caracteriza o de aspectos produtivos de vacas Brangus Ibag com distintos graus de fertilidade). Ciencia Rural 32 (4): 663-667, ISSN: 0103-8478.

NAL Call Number: S192.R4

Keywords: beef cattle, reproductive performance, weight gain, maternal behavior, Rio Grande do sul, Brazil, Portuguese language.


Otoi, T.; Koyama, N.; Yamamoto, K.; Tachikawa, S.; Suzuki, T (2000). Effect of removal of large follicles after artificial insemination on embryo yield of superovulated beef cows. Canadian Journal of Animal Science 80 (1): 199-201, ISSN: 0008-3984.

NAL Call Number: 41.8 C163

Keywords: artificial insemination, follicle removal, embryo transfer, embryo quality, freezable, superovulation.


Penny, C.D. (1998). Practical oestrus synchronisation techniques in beef suckler herds. Cattle Practice 6 (3): 169-173. ISSN: 0969-1251.

NAL Call Number: SF961 C37

Keywords: estrus cycle, estrus synchronization, artificial insemination, reproduction control.


Perry, G.A.; Smith, M.F.; Patterson, D.J. (2002). Evaluation of a fixed-time artificial insemination protocol for postpartum suckled beef cows. Journal of Animal Science 80 (12): 3060-3064, ISSN: 0021-8812.

NAL Call Number: 49 J82

Keywords: melengestrol acetate (MGA), oral progestin, gonadotropin-releasing hormone (GnRH), prostaglandin F2alpha (PG), estrus synchronization. fertility levels, herd studies, pregnancy rates.


Piedrafita, J.; Ruiz de la Torre, J.L.; Quintanilla, R.; Manteca, X. (2000). Variation in gestation length as breeding season advances in Bruna dels Pirineus beef cattle breed. Annales de Zootechnie 49 (4): 353-356, ISSN: 0008-424X.

NAL Call Number: 49 F84

Keywords: beef cattle, cows, Bruna dels Pirineus, breed, breeding season, pregnancy, gestation period, domestication, mating, natural service, Spain.


Pleasants, A.B. (1997). Use of a stochastic model of a calving distribution for beef cows for formulating optimal natural mating strategies. Animal Science: An International Journal of Fundamental and Applied Research 64 (3): 413-421.

NAL Call Number: SF1.A56

Keywords: cows, parturition, copulation, mathematical models, mating systems, parturition interval, reproductive performance, statistical methods, estrus cycle, gestation period, time, developmental stages, animal performance, biological rhythms, developmental stages.


Rae, D.O.; Ramsay, K.H.; Morrison, R.L. (2002). Effect of chlortetracycline in a trace mineral salt mix on fertility traits in beef cattle females in Florida. Journal of Animal Science 80 (4): 880-885, ISSN: 0021-8812.

NAL Call Number: 49 J82

Abstract: The study objective was to determine the effect of chlortetracycline in an ad libitum trace-mineralized salt mix given to heifers before and(or) during bull exposure on the proportion pregnant and the time to conception in a fixed breeding period. Heifers (n = 768), 13 to 15 mo of age, were individually identified, immunized (Leptospira, Campylobacter fetus), examined (body condition score, vaginal lesion score, BW), and randomly allocated within 2 x 2 factorial blocks of treatments where trace mineral salt with and without chlortetracycline medication was provided in similar but nonadjacent pastures either before and(or) during bull exposure. The chlortetracycline feeding period was about 30 d for each. In the 2 d immediately before bull exposure, heifers were examined (body condition score, vaginal lesion score, reproductive tract evaluation) and reallocated to treatment pastures. Pregnancy was determined by per rectal palpation at 45 d following bull removal. Mineral intake was below that expected for heifer groups and, as a result, chlortetracycline intake was estimated at less than one-third of that targeted. Many heifers were not cycling reproductively at the onset of bull exposure (n = 456, 60.3%, based on a reproductive tract score < 3). Despite these limitations, heifers receiving chlortetracycline treatment before breeding had a pregnancy percentage of 65% (chlortetracycline before and during breeding 67% and chlortetracycline before breeding 61.8%) compared to those receiving no treatment before breeding (53%, P < 0.03; no chlortetracycline before or during breeding 60.4% and chlortetracycline during breeding 47.4%). Heifers receiving chlortetracycline treatment before breeding were 57% more likely to become pregnant than those not treated before breeding. Change in vaginal lesion score was associated with the proportion pregnant, but neither body condition score nor average daily gain were.

Keywords: antibiotics, tetracycline, pharmacology, chlortetracycline, fertility, breeding, reproduction.


Rasyid, A.; Yusran, M.A.; Ma”sum, K. (1996). Effect of age on semen production in Madura cattle. [Pengaruh terhadap produksi semen pada sapi Madura.] In: Proceedings of scientific meeting on animal husbandry research results: application for small scale industry. [Prosiding temu ilmiah hasil-hasil penelitian peternakan: aplikasi hasil penelitian untuk industri peternakan rakyat.] Basuno, E.; Mahyuddin, P.B.; Saepudin, Y.; Hidayat, S. (eds.), Balitnak: Bogor, Indonesia, pp. 229-233, ISBN: 979-8261-27-5.

Keywords: bulls, breed, Mandura, age, parameters measured, semen volume, sperm concentration, motile sperm, consistency and semen pH, Indonesian language, Indonesia.


Rawlings, N.C.; Kastelic, J.P.; Evans, A.C.O.; Bartlewski, P.M.; Beard, A.P.; Chandolia, R.K.; Cook, S.J. (2002). Plasma concentrations of cortisol and progesterone during the period of reproductive development in beef and dairy heifers. Animal Science: An International Journal of Fundamental and Applied Research 75 (2): 281-288, ISSN: 1357-7298.

NAL Call Number: SF1.A56

Keywords: age, beef cattle, blood plasma, corticotropin, heifers, hydrocortisone, progesterone, reproduction, handling, naive versus handled heifers.


Reddy, M.; Davis, M.E.; Simmen, R.C.M. (1996). Correlated responses in scrotal circumference,semen traits,and reproductive performance due to selection for increased or decreased blood serum IGF, I concentration in Angus beef cattle. Journal of Animal Science 74 (Suppl. 1): 108, ISSN: 0021-8812.

NAL Call Number: 49 J82

Keywords: adult, angus, beef breed, calf crop percentage, calving date records, dam, female, Igf-I, insulin-like growth factor-1, levels, male, mating records, meeting abstract, reproductive performance, reproductive system, scrotal circumference, semen traits.


Richardson, A.M.; Hensley, B.A.; Marple, T.J.; Johnson, S.K.; Stevenson, J.S. (2002). Characteristics of estrus before and after first insemination and fertility of heifers after synchronized estrus using GnRH, PGF2 alpha, and progesterone. Journal of Animal Science 80 (11): 2792-2800, ISSN: 0021-8812.

NAL Call Number: 49 J82

Keywords: animal behavior, artificial insemination, beef cattle, conception rate, dairy cattle, female fertility, GnRH, heifers, estrus, pregnancy rate, progesterone, prostaglandins, sexual behavior, synchronization, synchronized females.


Riha, J.; Seidenglanz, J. Wenkoff, M.S.; Smith, A.; Millar, P. (1996). Embryo transfer in extensive beef cattle breeds. Zivocisna Vyroba - UZPI 41 (6): 237-244, ISSN: 0044-4847.

NAL Call Number: 49.9 C33

Keywords: cows, imported beef breed embryos, Hereford, Aberdeen-Angus, Galloway, Highland, embryo transfer, embryo preservation, estrus synchronization, superovulation, conception rates, biological preservation, Czech Republic.


Rodriguez, R.O.L.; Rivera, M.J. (1999). Fertility of beef cattle females with mating stimuli around insemination. Animal Reproduction Science 54 (4): 221-226, ISSN: 0378-4320.

NAL Call Number: QP251.A5

Keywords: cows, sexual behavior, stimuli, fertility, artificial insemination, pregnancy, copulation, husbandry methods.


Ruas, J.R.M.; Marcatti Neto, A.; Amaral, R. (2000). Considerations about the handling at the pre and pos-parturition beef cows and their reflexes about the reproductive performance. [Consideracoes sobre o manejo no pre e pos-parto de vacas de corte e seus reflexos sobre a eficiencia reprodutiva.] Informe Agropecuario: Empresa de Pesquisa Agropecuaria de Minas Gerais 21 (205): 70-75, ISSN: 0100-3364.

Keywords: reproduction, copulation, parturition, fertilization, Portuguese language, Brazil.


Selph, J.F.; Hogue, P.J.; Stice, E.J.; Seawright, T.E.; Gary, L.A.; Mikulecky, G.; Arthington, J.D.; Sand, R.S. (2002). Beef cattle reproductive management school of The South Florida Beef-Forage Program. Journal of Animal Science 80 (Suppl. 2): 6-7, ISSN: 0021-8812.

NAL Call Number: 49 J82

Keywords: South Florida Beef-Forage Program, breeding, herd management, nutrition, pregnancy, reproduction, reproductive management school, education.


Sinclair, K.D.; Broadbent, P.J. (1996). Increasing the efficiency of suckled calf production using embryo transfer technology. Veterinary Record  139 (17): 409-412, ISSN: 0042-4900.

NAL Call Number: SF601 I4

Keywords: beef calf production, embryo transfer, efficiency, technology, animal breeding, genetic progress, economics, pregnancy rates, management of twin-bearing cows.


Smeaton, D.C.; Vivanco, W.H. (2002). Profitability of the use of new reproductive technologies in beef production systems. Proceedings of the New Zealand Society of Animal Production, pp.133-137, ISSN: 0370-2731.

NAL Call Number: 49.9 N483

Keywords: embryo transfer, fertilization method, new reproductive technology, beef industry, beef production systems, new reproductive technology, profitability, sex ratio.


Soto, R.; Rubio, I.; Galina, C.S.; Castillo, E.; Rojas, S. (2001). Effect of pre- and post-partum feed supplementation on the productive and reproductive performance of grazing primiparous Brahman cows. Tropical Animal Health and Production 33 (3): 253-264, ISSN: 0049-4747.

NAL Call Number: SF601 T7

Keywords: Brahman cows, breed, feed supplementation, pre- and post-calving, reproductive performance, digestible energy, dry matter, crude protein, body weight, body condition score, urea, plasma, estrus, pregnancy rates.


Spire, M.F. (1997). Managing replacement heifers from weaning to breeding. Veterinary Medicine 92 (2): 182-183, 186-192.

NAL Call Number: 41.8 M69

Keywords: heifers, replacement, beef cattle, reproductive performance, optimization, husbandry.


Stevenson, J.S.; Thompson, K.E.; Forbes, W.L.; Lamb, G.C.; Grieger, D.M.; Corah, L R (2000). Synchronizing estrus and(or) ovulation in beef cows after combinations of GnRH, norgestomet, and prostaglandin F2alpha with or without timed insemination. Journal of Animal Science 78 (7): 1747-1758, ISSN: 0021-8812.

NAL Call Number: 49 J82

Keywords: suckled beef cows, gonadotropin releasing hormone (GnRH), fertility drug, norgestomet, prostaglandin F-2-alpha (PGF-2-alpha), implant, artificial insemination, body condition score, analytical method, estrus synchronization, assisted reproduction method, ovulation synchronization, assisted reproduction method, breeding season, conception rate, ovulation, pregnancy rate.


Todoroki, J.; Yamakuchi, H.; Mizoshita, K.; Kubota, N.; Tabara, N.; Noguchi, J.; Kikuchi, K.; Watanabe, G.; Taya, K.; Kaneko, H. (2001). Restoring ovulation in beef donor cows with ovarian cysts by progesterone-releasing intravaginal silastic devices. Theriogenology 55 (9): 1919-1932, ISSN: 0093-691X.

NAL Call Number: QP251.A1T5

Keywords: beef cows, reproductive problems, ovarian cysts, Controlled Internal Drug Release, progesterone-releasing intravaginal silastic device, estrus behavior, follicular development, plasma estradiol


Valle, E.R. do; Andreotti, R.; Thiago, L.R.L. (1998). Strategies for the improvement of reproductive performance in beef cattle. [Estrategias para aumento da eficiencia reprodutiva e produtiva em bovinos de corte.] Centro Nacional de Pesquisa de Gado de Corte (CNPGC) (EMBRAPA): Campo Grande, Brazil, Documentos- Centro Nacional de Pesquisa de Gado de Corte (No. 71): 80 p., ISSN: 0100-9443.

Keywords: tropics, beef cattle, cows, female fertility, breeding season, male fertility, body condition, mating systems, pregnancy diagnosis, culling, weaning, animal nutrition, animal health, animal husbandry, reproduction, calf production, reviews, Portuguese language, Brazil.


Vasilev, G. (1996). Experiments for application of a rearing cyclogram for beef cattle. [Opiti za prilagane na tsiklograma pri otglezhdane na goveda mesodajno napravlenie.] Zhivotnov’dni Nauki, Animal Science 33(7-8): 51-54, ISSN: 0514-7441.

Keywords: reproduction, estrus synchronization, artificial insemination, Bulgarian language.


Vassena, R.; Adams, G.P.; Mapletoft, R.J.; Pierson, R.A.; Singh, J. (2003). Ultrasound image characteristics of ovarian follicles in relation to oocyte competence and follicular status in cattle. Animal Reproduction Science 76 (1/2): 25-41, ISSN: 0378-4320.

NAL Call Number: QP251.A5

Keywords: beef cattle, crossbred, in vitro culture, in vitro fertilization, culturing techniques, non-invasive method, ultrasound, imaging and microscopy techniques, follicular status.


White, F.J.; Wettemann, R.P.; Looper, M.L.; Prado, T.M.; Morgan, G.L. (2002). Seasonal effects on estrous behavior and time of ovulation in nonlactating beef cows. Journal of Animal Science 80 (12): 3053-3059, ISSN: 0021-8812.

NAL Call Number: 49 J82

Keywords: beef cattle, cows, reproductive behavior, diurnal variation, mating behavior, estrous cycle, HeatWatch system, duration of estrus, ovulation, seasonal variation.


Yamamoto, N.; Koike, T.; Entsu, S.; Otani, I. (1997). Economic evaluation of embryo transfer on animal production. Bulletin of the Chugoku National Agricultural Experiment Station 17: 1-26, ISSN: 0913-4239.

NAL Call Number: S471 J3C84

Keywords: milk and beef production, breed, Wagyu, embryo transfer, economic analysis, animal production, pregnancy, artificial insemination, Japanese language, Japan.


Yavas, Y.; Walton, J.S.. (2000). Induction of ovulation in postpartum suckled beef cows: a review. Theriogenology 54 (1): 1-23.

NAL Call Number: QP251.A1T5

Keywords: suckled beef cows, calf crop, economic loss, anterior pituitary LH, comparison of methods to initiate cyclicity, weaning of calves (either complete,temporary or partial), exposure to bulls, hormonal methods such as administration of GnRH (either single injection, intermittent injections,or continuous infusion), gonadotropins (eCG,FSH,hCG), steroids (estrogens,anti-estrogens,and progestogens), exogenous progestogens, intravaginal devices, controlled-internal drug release (CIDR), progesterone-releasing intravaginal device (PRID), norgestomet implants, feed-additive melengestrol acetate (MGA).


Yavas, Y.; Walton, J.S. (2000). Postpartum acyclicity in suckled beef cows: a review. Theriogenology 54 (1): 25-55.

NAL Call Number: QP251.A1T5

Keywords: suckled beef cows, economic loss, suckling status, nutritional status, calving season, age, dominant follicles, LH pulses, hypothalamic GnRH, negative feedback effect of ovarian estradiol-17beta, premature luteolysis, PGF2alpha.


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