Allore, H.G., L D Warnick, J Hertl, and Y T Grohn (2001). Censoring in survival analysis: a simulation study of the effect of milk yield on conception. Preventive Veterinary Medicine 49 (3-4): 223-234, ISSN: 0167‑5877.
NAL Call No.: SF601.P7
Keywords: interval from calving to conception, milk yield on days open, culling, simulated data sets.

Arbel, R, Y. Bigun, E. Ezra, H. Sturman, and D. Hojman (2001). The effect of extended calving intervals in high yielding lactating cows on milk production and profitability. Journal of Dairy Science 84(3): 600 608, ISSN: 0022‑0302.
NAL Call No.: 44.8 J822
Keywords: calving interval, high yielding cows, primiparous cows, lactation, multiparous cows, lactation, economic advantage.

At Taras, E.E. and S.L. Spahr (2001). Detection and characterization of estrus in dairy cattle with an electronic heatmount detector and an electronic activity tag. Journal of Dairy Science 84 (4): 792-798, ISSN: 0022‑0302.
NAL Call No.: 44.8 J822
Keywords: lactating dairy cows, length, onset of estrus, electronic heatmount sensor, HeatWatch, electronic activity tag, Heat Seeker, activity ratio, mounting, physical activity, estrus detection, improved the efficiency of detection over visual observation.

Becker, F., W. Kanitz, and F. Schneider (2001). Timed artificial insemination in cattle: Mission impossible? Archiv fuer Tierzucht 44 (Special Issue): 68‑70, ISSN: 0003‑9438.
NAL Call No.: 49 AR23
Keywords: estradiol, fertility‑drug, hormone drug, gonadotrophin releasing hormone, fertility drug, hormone drug, luteinizing hormone, prostaglandin F 2 alpha, fertility drug, hormone drug, estrous synchronization, assisted reproduction method, timed artificial insemination, assisted reproduction method, fertility, lactation, reproductive efficiency.

Cartmill, J.A., S.Z. El Zarkouny, B.A. Hensley, G.C. Lamb, and J.S. Stevenson (2001). Stage of cycle, incidence, and timing of ovulation, and pregnancy rates in dairy cattle after three timed breeding protocols. Journal of Dairy Science 84 (5): 1051-1059, ISSN: 0022‑0302.
NAL Call No.: 44.8 J822
Keywords: cows, Ovsynch protocol, GnRH injection, PGF2alpha injection, insemination, palpation, pregnancy rates, embryo survival.

Cordoba, M.C., R. Sartori, and P.M. Fricke (2001). Assessment of a commercially available Early Conception Factor (ECF) test for determining pregnancy status of dairy cattle. Journal of Dairy Science 84 (8): 1884-1889, ISSN: 0022‑0302.
NAL Call No.: 44.8 J822
Keywords: breed, Holstein cows, heifers, Early Conception Factor (ECF) test, commercially available qualitative assay, pregnancy detection, glycoprotein, bovine serum, conception, embryonic loss, false positive results, blood sampling, unreliable method.

Darwash, A.O., G.E. Lamming, and M.D. Royal (2001). A protocol for initiating oestrus and ovulation early post partum in dairy cows. Animal Science Pencaitland 72 (3): 539-546.
Keywords: Holstein Friesian, breed, cows, prostaglandin F2alpha (PGF2alpha) and progesterone (P4) treatment, initiating estrus and ovulation post partum, incidence of silent ovulation, reproductive performance.

de Mol, R.M., G.H. Kroeze, J.M.F.H. Achten, K. Maatje, and W. Rossing (1997). Results of a multivariate approach to automated oestrus and mastitis detection dairy cows. Livestock Production Science 48(3): 219-227, ISSN: 0343-0200.
NAL Call No.: SF761 Z4
Keywords: estrus detection, mastitis detection, time series analysis, Kalman filter, telemetry.

Deshmukh, B.T., A.S. Nagvekar, B.A. Talvelkar, S.H. Dalvi, and S.R. Chinchkar (2001). Effect of bovine somatotropin on blood serum minerals, thyroid hormones and reproductive performance of lactating crossbred cows. Indian Journal of Animal Sciences 71(7): 663-666.
NAL Call No.: 41.8 IN22
Keywords: multiparous lactating crossbred cows, treatment, sometribove zinc suspension, sustained release preparation, blood samples, bovine somatotropin, blood serum calcium, phosphorus, magnesium, sodium, potassium, chloride, serum triiodothyronine, thyroxine concentrations,

Dobson, H., J.E. Tebble, R.F. Smith, and W.R. Ward (2001). Is stress really all that important? Theriogenology 55 (1): 65‑73, ISSN: 0093‑691X.
NAL Call No.: QP251.A1T5
Keywords: dairy cows, embryo transfer, female fertility, pregnancy rate, animal welfare, stress.

Fernandes, C.A.C., D.S. Costa, and J.H.M. Viana (2001). Impact of the retained placenta on the reproductive performance in cattle. [Impacto da retencao de placenta sobre a performance reprodutiva de vacas leiteiras.] Revista Brasileira De Reproducao Animal 25 (1): 26-30.
NAL Call No.: QP251.R48
Keywords: cows, dairy farms, incidence of retained placenta, effect on the reproductive performance, incidence of uterine infection, interval from parturition to first estrus, number of services/conception, body condition.

Galimberti, A.M., F.A. Fonseca, M.C.C. Araujo, E.P. da Costa, C. de Freitas, J.D. Guimaraes, and A. de M. Ferreira (2001). Pregnancy rate and plasma progesterone concentrations in bovine embryo recipients treated with buserelin after embryo transfer. [Taxa De Gestacao e Niveis Plasmaticos De Progesterona, Em Receptoras De Embriao Bovino, Tratadas Com Buserelina Apos a Inovulacao.] Revista Brasileira De Zootecnia 30(2): 353-359.
NAL Call No.: SF1 R45
Keywords: dairy cows, heifers, crossbred, hormonal treatment, GnRH agonist, buserelin, embryo transfer, pregnancy rate, progesterone in bovine embryo recipients, plasma concentrations, blood collection pregnancy diagnosis, transrectal way.

Garcia, S.C., and C.W. Holmes (2001). Lactation curves of autumn and spring calved cows in pasture based dairy systems. Livestock Production Science 68 (2-3): 189-203.
NAL Call No.: SF1 L5
Keywords: linear based, non linear based, analysis method for lactation curves, effects of calving season, total milk yield, milk composition, autumn and spring calved cows, seasonal variation.

Godden, S.M., D.F. Kelton, K.D. Lissemore, J.S. Walton, K.E. Leslie, and J.H. Lumsden (2001). Milk urea testing as a tool to monitor reproductive performance in Ontario dairy herds. Journal of Dairy Science 84 (6): 1397-1406, ISSN: 0022‑0302.
NAL Call No.: 44.8 J822
Keywords: Holstein, breed, cows, dairy herd improvement test day data, commercial dairy herds, milk urea concentrations, infrared test method, reproductive performance, fertility pregnancy, insemination, nitrogen excretion.

Guzeloglu, A., J.D. Ambrose, T. Kassa, T. Diaz, M.J. Thatcher, and W.W. Thatcher (2001). Long‑term follicular dynamics and biochemical characteristics of dominant follicles in dairy cows subjected to acute heat stress. Animal Reproduction Science 66 (1/2): 15‑34, ISSN: 0378‑4320.
NAL Call No.: QP251.A5
Keywords: dairy cows, ovarian follicles, heat stress, estrus, quality, progesterone, prostaglandins, air temperature, body temperature, follicular fluid, heat shock proteins, molecular weight.

Hansen, P.J. and C.F. Arechiga, (1999). Strategies for managing reproduction in the heat-stressed dairy cow. Journal of Animal Science 77(Suppl. 2): 36-50.
NAL Call No.: 49 J82
Abstract: Establishment and maintenance of pregnancy is difficult in lactating dairy cows exposed to heat stress because of reductions in estrous detection rate and the proportion of inseminated cows that maintain pregnancy. The most common approach to ameliorate heat stress in developed countries has been to alter the cow's environment through provision of shade, fans, sprinklers, and so on. Nonetheless, seasonal variation in reproductive function persists. Increased understanding of bovine reproductive function and its alteration by heat stress has led to additional strategies for reducing deleterious consequences of heat stress on reproduction. These include hormonally induced timed artificial insemination, which can reduce losses in reproductive efficiency caused by poor detection of estrus, and embryo transfer, which can increase pregnancy rate by allowing embryos to bypass the period when they are most sensitive to elevated temperature (i.e., in the first 1 to 2d after breeding). Other efforts are directed toward developing methods to protect the embryo from harmful actions of elevated temperature. Approaches being studied include manipulation of embryonic synthesis of heat shock proteins and use of antioxidants to reduce free radical damage associated with heat stress. It may also be possible to reduce the magnitude of hyperthermia caused by heat stress. This might be possible physiologically, for example by feeding of agents that affect thermoregulatory systems, or genetically by selecting for specific traits conferring thermal resistance. Finally, the development of bovine somatotropin as a lactational promotant means that it may be possible to extend lactations beyond 305 d and voluntarily discontinue inseminations during periods of heat stress.
Keywords: dairy cows, heat stress, lactation, body temperature, body temperature regulation, estrus detection, postpartum interval, pregnancy rate, embryo mortality, uterus, oviducts, spermatozoa, heat shock, genetic resistance,embryo transfer, literature reviews.

Hansen, P.J., M. Drost, R.M. Rivera, F.F. Paula-Lopes, Y.M. Al-Katanani, C.E. Krininger, and C.C. Chase (2001). Adverse impact of heat stress on embryo production: causes and strategies for mitigation. Theriogenology 55 (1): 91-103.
NAL Call No.: QP251 A1T5
Keywords: dairy cows, beef cows, body temperature regulation, superovulation.

Hernandez, J., J.K. Shearer, and D.W. Webb (2001). Effect of lameness on the calving to conception interval in dairy cows. Journal of the American Veterinary Medical Association 218 (10): 1611-1614, ISSN: 0003‑1488.
NAL Call No.: 41.8 Am3
Keywords: lactating dairy cows, lameness, reproductive performance, interval from calving to conception, number of breedings required per conception, foot rot, papillomatous digital dermatitis, claw lesions, multiple lesions.

Hernandez, C.J. and R.J.S. Morales(2001). Conception failure in dairy cattle: Evaluation of hormone therapies.[Falla en la concepcion en el ganado lechero: Evaluacion de terapias hormonales.] Veterinaria Mexico 32(4): 279‑287, ISSN: 0301‑5092.
NAL Call No.: SF604.V485
Keywords: bovine somatotrophin, human chorionic gonadotropin, progesterone, conception rate, fertility, milk production, pregnancy, mortality, early embryonic death, repeat breeder cows.

Heuer, C., Y.H. Schukken, L.J. Jonker, J.I.D. Wilkinson, and J.P.T.M. Noordhuizen (2001). Effect of monensin on blood ketone bodies, incidence and recurrence of disease and fertility in dairy cows. Journal of Dairy Science 84 (5): 1085-1097, ISSN: 0022‑0302.
NAL Call No.: 44.8 J822
Keywords: effect of monensin, milk production, health, reproduction, calving, clinical mastitis, intramammary infection, lameness, calving to conception intervals, endometritis, cystic ovarian disease.

Holmes, C.W. (2001). Managing fertility in the New Zealand dairy herd. Proceedings of the New Zealand Society of Animal Production 61:135‑140, ISSN: 0370‑2731.
NAL Call No: 49.9 N483
Keywords: dairy cows, body condition, feeding, fertility, genetics, health, lactation, milk products, milk yield, reviews, New Zealand.

Kennedy, A.D. and J.R. Ingalls (1995). Estrus detection with activity tags in dairy cows housed in tie-stalls. Canadian Journal of Animal Science 75(4): 633-636, ISSN: 0008-3984.
NAL Call No.: 41.8 C163
Keywords: activity, estrus-detection, tie-stall, reproduction.

Kruip, T.A.M., J. Stefanowska, and W. Ouweltjes (2000). Robot milking and effect on reproduction in dairy cows: a preliminary study. Animal Reproduction Science 60-61: 443-447.
NAL Call No.: QP251 A5
Keywords: robot milking, fertility, sexual reproduction, lactation, energy balance, fecundity, husbandry, feed rations, live weight, weight loss, body condition.

Kumar, H., S. Mahmood, and L.P. Singh (2001). Treatment of placental retention with ecbolic drugs and its effect on subsequent fertility in crossbred cows. Indian Journal of Animal Sciences 71 (7): 654-657.
NAL Call No.: 41.8 IN22
Keywords: cows, fertility response, retained fetal membranes, ecbolic drugs, intrauterine infusion, oriprim bolus, synotocinon, luprostiol, estradiol valerate, herbal drug, metrali, reproductive efficiency, interval from parturition to conception, number of services per conception.

LeBlanc, S. (2001). The Ovsynch breeding program for dairy cows: a review and economic perspective. Bovine Practitioner 35 (1): 13-22.
NAL Call No.: SF779.5 A1B6
Keywords: program for synchronization of ovulation (Ovsynch), heat detection, reproductive performance, artificial insemination, economic impact, literature review.

Lucy, M.C. (2001). Reproductive loss in high producing dairy cattle: where will it end? Journal of Dairy Science 84 (6): 1277-1293, ISSN: 0022‑0302.
NAL Call No.: 44.8 J822
Keywords: dairy industry, milk production per cow, steady increase, improved management, better nutrition, intense genetic selection, larger herd size, reproductive physiology control of the estrous cycle, metabolic effects of lactation on reproduction, mechanisms linking disease to reproduction, early embryonic mortality, infertility, United States.

Mahmoudzade, A.R., M Tarahomi, and H. Fotoohi (2001). Effect of abnormal vaginal discharge at oestrus on conception rate after artificial insemination in cows. Animal Science Pencaitland 72 (3): 535- 538.
Keywords: cows, heifers, Holstein Friesian, breed, estrus, visual characteristics of the cervical mucous discharge, cervical mucus with urine, cervical mucus with microbes, cervical mucus with blood, no cervical mucus, artificial insemination, conception rate.

Mele, M., P. Secchiari, A. Serra, G. Ferruzzi, F. Paoletti, and M. Biagioni (2001). Application of the Atracking signal@ method to the monitoring of udder health and oestrus in dairy cows. Livestock Production Science 72(3): 279‑284, ISSN: 0301‑6226.
NAL Call No.: SF1 L5
Keywords: dairy cows, models, simulations, computational biology, udder health, reproductive system tracking signal method, monitoring method, estrus, milk electrical conductivity, moving average model, mastitis.

Morales, R.J.S., L Zarco, C.J. Hernandez, and G. Rodriguez (2001). Effect of short term treatment with bovine somatotropin at estrus on conception rate and luteal function of repeat breeding dairy cows. Theriogenology 55 (9): 1831-1841.
NAL Call No.: QP251.A1T5
Keywords: cows, Holstein, breed, estrus on progesterone concentrations, conception rate, repeat breeding, artificial insemination, recombinant bovine somatotropin, luteal function, blood samples.

Moran, J. and D. McLean (2001). Heifer Rearing: A Guide to Rearing Dairy Replacement Heifers in Australia Bolwarrah Press: Bolwarrah, Vic., 135 p.
NAL Call No: SF208 H44
Keywords: calving weights, liveweights, growth, first calving, natural mating, artificial insemination, nutrition, grazing management, disease prevention, herd health, economics, dairy beef, replacement heifers, best management practices

Moreira, F., C. Orlandi, C.A. Risco, R. Mattos, F. Lopes, and W.W. Thatcher (2001). Effects of presynchronization and bovine somatotropin on pregnancy rates to a timed artificial insemination protocol in lactating dairy cows. Journal of Dairy Science 84 (7): 1646-1659, ISSN: 0022‑0302.
NAL Call No.: 44.8 J822
Keywords: cows, lactating Holstein, breed, presynchronization, bovine somatotropin (bST), pregnancy rates, artificial insemination, GnRH, PGF2alpha, increase first service pregnancy.

Mosure, W.L., R.A. Meyer, J. Gudmundson, and A.D. Barth (1998). Evaluation of possible methods to reduce pain associated with electroejaculation in bulls. Canadian Veterinary Journal 39(8): 504-506, ISSN: 0008-5286.
NAL Call No.: 41.8 R3224
Keywords: bulls, evaluation, pain, heart rate, electroejaculation, animal welfare, anaesthesia, lidocaine, xylazine, heart rate, semen collection.

Norup, L.R., P.W. Hansen, K.L. Ingvartsen, and N.C. Friggens (2001). An attempt to detect oestrus from changes in Fourier transform infrared spectra of milk from dairy heifers. Animal Reproduction Science 65(1/2): 43-50.
NAL Call No.: QP251 A5
Keywords: dairy cows, heifers, milk, estrus, infrared spectroscopy, estrous cycle, lactation, prostaglandins, synchronized females, diagnosis.

Pryce J.E., M.P. Coffey, and G. Simm(2001). The relationship between body condition score and reproductive performance. Journal of Dairy Science 84(6):1508‑15, ISSN: 0022-0302.
NAL Call No.: 44.8 J822
Keywords: dairy cows, body condition score, ad libitum diets, high concentrates, low concentrates, genetic differences, production.

Rensis, F. de, and R.J. Scaramuzzi (2001). The heat stress and seasonal effects on reproduction in dairy cow. Annali della Facolta di Medicina Veterinaria, Universita di Parma 20: 92, ISSN: 0393‑4802.
Keywords: female fertility, Graafian follicles, heat stress, hypothalamus, infertility, ovaries, pituitary, pregnancy, reviews, summer, Italy.

Ronchi, B., G. Stradaioli, A.V. Supplizi, U. Bernabucci, N. Lacetera, P.A. Accorsi, A. Nardone, and E. Seren (2001). Influence of heat stress or feed restriction on plasma progesterone, oestradiol‑17beta, LH, FSH, prolactin and cortisol in holstein heifers. Livestock Production Science 68 (2/3): 231‑242, ISSN: 0301‑6226.
NAL Call No.: SF1.L5
Keywords: heifers, dairy cows, heat stress, food restriction, blood chemistry, progesterone, estradiol, LH, FSH, prolactin, hydrocortisone, hormone secretion, feed rations, air temperature.

Rutledge, J.J. (2001). Use of embryo transfer and IVF to bypass effects of heat stress. Theriogenology 55 (1): 105‑111, ISSN:0093‑691X.
NAL Call No.: QP251.A1T5
Keywords: dairy cows, embryo culture, pregnancy rate.

Smeaton D.C., and H.W. Vivanco (2001). Potential benefits from new reproductive technologies in commercial dairy herds, a case study simulation. Proceedings of the New Zealand Society of Animal Production 61: 199‑202, ISSN: 0370‑2731.
NAL Call No.: 49.9 N483
Keywords: bull, calf, dairy cow, embryo, female, heifer, immature, male, computer software, embryo transfer, assisted reproduction method, milking, collection method, new reproductive technologies, potential benefits, reproductive method, simulation model, mathematical model method, status quo selection system, breeding method, breeding worth, genetic gain, production cull, control method, selection pressure, New Zealand.

Stevenson, J.S. (2001). Reproductive management of dairy cows in high milk‑producing herds. Journal of Dairy Science 84 (Elect. Supplement): E128‑E143, ISSN: 0022‑0302.
NAL Call No.: 44.8 J822
Keywords: dairy cows, breeding, husbandry, reproduction, reproductive efficiency, body condition, dry matter intake, transition from the dry period to lactation, estrous cycles, detection of estrus, embryonic survival, diet formulation, feed bunk management, cow comfort, free stalls, holding pens, milking parlor, temperature, humidity, proper hoof care, milking management, mastitis prevention.

Tolleson, D.R, R.D. Randel, J.W. Stuth, S.T. Willard, and B.S. Gandy (2001). Detection of pregnancy in cattle using near infrared reflectance spectroscopy of feces. Journal of Animal Science 79 (Supplement 2): 19, ISSN: 0021‑8812.
NAL Call No.: 49 J82
Keywords: dairy cows, feces, digestive system, near IR reflectance spectroscopy, assessment method, determination method, pregnancy, reproductive status.

van Eerdenburg F.J.C.M. and H. Verhoeven (2001). The influence of environmental stress around puberty on fertility in dairy cattle: Possible relations with sexual differentiation? Hormones and Behavior 39 (4): 353, ISSN: 0018‑506X.
NAL Call No.: QP801 H7H64
Keywords: behavior, behavioral neuroendocrinology, environmental stress, fertility, puberty, sexual behavior, sexual differentiation.

Velasco‑Garcia, M.N. and T. Mottram (2001). Biosensors in the livestock industry: An automated ovulation prediction system for dairy cows. Trends in Biotechnology 19(11): 433‑434, ISSN: 0167‑7799.
NAL Call No.: TA166 T72
Keywords: ovulation prediction system, automated, progesterone biosensor, pregnancy detection.

Verkerk, G.A., R.W. Claycomb, V.K. Taufa, P. Copeman, A. Napper, and E. Kolver (2001). CowTrakkerTM technology for improved heat detection. Proceedings of the New Zealand Society of Animal Production 61:172‑175, ISSN: 0370‑2731.
NAL Call No.: 49.9 N483
Keywords: breed, Holstein Friesian, progesterone, field equipment, Bovine Beacon, CowTrakker, motion detector, HeatWatch, pedometer; Kamar Heat Detector, artificial insemination, behavioral observation, pasture grazing, proactive reproductive management, tail paint, identification, New Zealand.

Wagner, D.C., R.H. BonDurant, and W.M. Sischo (2001). Reproductive effects of estradiol cypionate in postparturient dairy cows. Journal of the American Veterinary Medical Association 219 (2): 220-223, ISSN: 0003‑1488.
NAL Call No.: 41.8 Am3
Keywords: cows, postparturient, estradiol cypionate, reproductive efficiency, pregnancy rate.

Wainstein, A.G., A.S. Bernal, M.R. Iriondo, A.O. Luco (2001). Heatwatch, electronic heat detection system used in Holstein Friesian. [Heatwatch, sistema electronico de deteccion de celo evaluado en hembras Holstein Friesian.] Archivos de Zootecnia 50(191): 403‑406, ISSN: 0004‑0592.
NAL Call No.: 49 AR22
Keywords: cows, heifers, Holstein Friesian, breed, electronic heat detection system, traditional heat detection methods, farm equipment, field conditions.

Walker, W.L., R.L. Nebel, and M.L. Mcgilliard (1996). Time of ovulation relative to mounting activity in dairy cattle. Journal of Dairy Science 79(9): 1555-1561, ISSN: 0022-0302.
NAL Call No.: 44.8 J822
Keywords: ovulation, mounting, time activity, Holstein-Friesian, estrus, duration, mating behavior, synchronized females, artificial insemination, timing, telemetry, environmental temperature.

Xu, Z.Z., D.J. McKnight, R. Vishwanath, C.J. Pitt, and L.J. Burton (1998). Estrus detection using radiotelemetry or visual observation and tail painting for dairy cows on pasture. Journal of Dairy Science 81(1): 2890-2896, ISSN: 0022-0302.
NAL Call No.: 44.8 J822
Keywords: estrus detection, radiotelemetry, visual observation, remote recording, grazing, sexual behavior, calving season, Jersey, Friesian, remote sensing, milk composition, progesterone, conception rate, mounting, New Zealand.