Reproduction


Alexopoulos, C. (2001). Association of Fusarium mycotoxicosis with failure in applying an induction of parturition program with PGF2alpha and oxytocin in sows. Theriogenology 55 (8): 1745-57, ISSN: 0093-691X.

NAL Call No.: QP251 A1T5.

Abstract: This trial was conducted in a farrow-to-finish pig unit from November 1999 to February 2000. Since November 1998 an induction-of-parturition program was applied in gilts and sows with PGF2alpha (2 mL Dinolytic, i.m.) 113 d post service, followed by oxytocin (1 mL Intertocine-S, i.m.) 24 h later. This program resulted in a high proportion of animals farrowing within the working hours of the day. At mid December 1999 splay-legs and edematous swelling and reddening of the vulva started to be observed in newborn piglets. A concurrent decline of parameters related to parturition also was noticed. Mycotoxicological analyses of the feeds revealed a co-occurring contamination with deoxynivalenol and zearalenone. For a 4-week period, sows were divided into two groups: (a) an induction-of-parturition and (b) a non-induction-of-parturition group. Significant differences were found between the two groups relating to prevalence of dystocia (<.05) and pregnancy duration (<.05). Moreover, it was found that prevalence of splay-legs and swelling of the vulva were highly correlated (<.05) with reduction of percentage of sows farrowing within the working day and increase of pre-weaning mortality. It was concluded that such an induction-of-parturition program should be avoided during a Fusarium mycotoxicosis.

Keywords: dinoprost, pharmacology, fusarium, mycotoxicosis, labor, induced parturition, oxytocin, disease, physiopathology, animal feed, analysis, fetal death, epidemiology.


Almeida, F.R.; Mao, J.; Novak, S.; Cosgrove, J.R.; Foxcroft, G.R. (2001). Effects of different patterns of feed restriction and insulin treatment during the luteal phase on reproductive, metabolic, and endocrine parameters in cyclic gilts. Journal of Animal Science 79 (1): 200-212, ISSN: 0021-8812.

NAL Call No.: 49 J82.

Keywords: gilts, litter mates, nutrition, reproduction, oocyte, follicle stimulating hormone, insulin like growth factor I, estradiol, insulin, hormone drug, leptin, luteinizing hormone, progesterone, triiodothyronine [T3], feed restriction, transcutaneous ultrasonography, estrus cycle, fertility, ovulation.


Cheng, H., Althouse, G.C., Hsu, W.H. (2001). Prostaglandin F2alpha added to extended boar semen at processing elicits in vitro myometrial contractility after 72 hours of storage. Theriogenology 55 (9): 1901-1906, ISSN: 0093 691X.

Keywords: boars, semen, improved fertility, myometrial contractility, semen extender, prostaglandin F 2 alpha, fertility drug, artificial insemination.


Evans, A.C.; O' Doherty, J.V. (2001). Endocrine changes and management factors affecting puberty in gilts. Livestock Production Science 68 (1): 1-12, ISSN: 0301-6226.

NAL Call No.: SF1.L5.

Keywords: gilts, puberty, age at puberty, estrus, ovarian follicle, gonadotrophin secretion, luteinizing hormone, blood concentration, management influence, air quality, boar effect, body composition, body fat, body weight, breed differences, confinement, feed restriction, hormone profile, nutrition, lean meat, prepubertal period, puberty, induction, reproductive performance, seasonality, selective breeding, weight.


Irie, M. (2001). Available techniques for early pregnancy diagnosis in swine. Journal of Reproduction and Development 47 (Suppl. 1): S71-S81, ISSN: 0916-8818.

NAL Call No.: SF1 K3.

Keywords: detection method, non return method, rectal palpation, ultrasonography, imaging method, vaginal biopsy, estrus, farrowing, pregnancy stage.


Kashiwazaki, N.; Shino, M. (2001). Ability of in vitro manipulated porcine embryos to develop to piglets. Journal of Reproduction and Development 47 (Suppl. 1): S35-S39, ISSN: 0916-8818.

NAL Call No.: SF1 K3.

Keywords: transgenics, DNA microinjection method, genetic manipulation, in vitro production system, nuclear transfer, gene targeting technology, gene knockouts.


Klindt, J.; Yen, J.T.; Christenson, R.K. (1999). Effect of prepubertal feeding regimen on reproductive development of gilts. Journal of Animal Science 77 (8): 1968-1976, ISSN: 0021-8812.

NAL Call No.: 49 J82.

Abstract: The effect of prepubertal feed level on growth and reproductive development of gilts was investigated. At 13 wk of age, white crossbred gilts were penned individually and assigned to the following treatments: Ad lib, ad libitum intake from 13 to 25 wk of age (n = 64); Control, ad libitum intake from 13 wk of age until 100 kg BW and then 90% of ad libitum intake until 25 wk of age (n = 65); and Restricted, 74% of ad libitum intake from 13 wk to 25 wk of age (n = 64). Feed was formulated to primarily restrict energy intake. The study was replicated in two seasons. At 25 wk of age, gilts were moved to group pens, approximately 16 gilts/pen, allowed ad libitum access to feed, and estrus detection was initiated. Gilts were mated at first estrus and those recycling were remated. After mating, gilts were moved to gestation stalls and fed 1.5x maintenance. At 30 d of gestation, reproductive tracts were harvested, and numbers of corpora lutea (CL) and live embryos were recorded. From 13 to 25 wk of age, feed consumption was 258 for Ad lib, 251 for Control, and 189 kg/gilt for Restricted, and, from 13 wk of age until 30 d of gestation, total feed consumption was 367 for Ad lib, 356 for Control, and 299 kg/gilt for Restricted gilts. Age at puberty (196 d) and pregnancy (200 d) was not affected (P >.18) by treatment. However, the rate at which gilts attained puberty (e.g., percentage pubertal at 28 d) was greatest in Ad lib (75) and least in Control (61) gilts. Number of CL and live embryos at 30 d of gestation/gilt assigned to the study was unaffected (P >.21) by treatment. Quantity of feed consumed from 13 wk of age to 30 d of gestation per live embryo in gilts assigned to the study was 40.0 for Ad lib, 39.8 for Control, and 30.6 kg/gilt for Restricted gilts. These results indicate that moderate feed restriction of gilts during prepubertal development may increase efficiency of swine production without negative impact on reproductive performance through 30 d of gestation.

Keywords: gilts, pig feeding, puberty, plane of nutrition, energy intake, unrestricted feeding, restricted feeding, age differences, backfat, liveweight gain, estrus, detection, fat thickness, body weight, pregnancy rate, corpus luteum, litter size, feed conversion.


Korthals, R.L. (1999). The effectiveness of using electronic identification for the identification of estrus in swine. ASAE/CSAE-SCGR Annual International Meeting, Toronto, Ontario, Canada, July 18-21, 1999, ASAE Paper No. 994213, American Society of Agricultural Engineers (ASAE): St Joseph, USA.

Keywords: boars, sows, techniques, estrus detection, economics, detection.


Labrecque, R.; Labrecque, G. (2001). Method and system for detecting estrus in swine. Official Gazette of the United States Patent and Trademark Office Patents 1244 (2): No Pagination, ISSN: 0098-1133.

NAL Call No.: T223 A21.

Keywords: patent, moveable cart, transport male hog, estrus detection, snout to snout contact, farm equipment.


Martinez, E.A.; Vazquez, J.M.; Roca, J.; Lucas, X.; Gil, M.A.; Parrilla, I.; Vazquez, J.L. (2001). Deep intrauterine insemination in sows with a low number of spermatozoa: A new and simple procedure. Theriogenology 55 (1): 248, ISSN: 0093-691X.

NAL Call No.: QP251 A1T5.

Keywords: cervix, reproductive system, spermatozoa, reproductive system, deep intrauterine insemination, assisted reproduction method, fertilization method, fiberoptic endoscope technique, insemination method.


Mejia Silva, W.; Cruz Arambulo, R.; Calatayud Marques, D.; Leon, G.; Quintero-Moreno, A. (2001). Use of real-time ultrasound for early pregnancy diagnosis in the sow. [Uso de ultrasonografia modo b en tiempo real para diagnostico precoz de gestacion en la cerda.] Produccion y Patologia Porcina 11 ( 5 ): 418-422, ISSN: 0798-2259.

Keywords: artificial insemination, diagnostic value, early diagnosis, gilts, pregnancy, pregnancy diagnosis, sows, ultrasonic diagnosis, ultrasonography, Spanish language.


Nagai, T. (2001). The improvement of in vitro maturation systems for bovine and porcine oocytes. Theriogenology 55 (6): 1291 1301, ISSN: 0093-691X.

NAL Call No.: QP251 A1T5.

Keywords: pigs, cattle, biotechnology, cloning, efficiency, genetically modified, in vitro methods, in vitro embryo production, ovary selection, in vitro oocyte maturation systems, oocyte biotechnology.


Neaupane, T.R.; Pandit, R.K.; Jogi, S. (2001). Pregnancy diagnosis and induction of farrowing in crossbred sows. Indian Journal of Animal Sciences 71 (2): 142-143, ISSN: 0367-8318.

NAL Call No.: 41.8 IN22.

Keywords: piglet, sow, breed, Large White Yorkshire, reproductive system, vagina, vaginal biopsy, diagnostic method, tiaprost frometamol, adverse effects, dosage, intramuscular administration, oxytocic drug, farrowing induction, piglet mortality, pregnancy diagnosis.


Park, K.W.; Kuhholzer, B.; Lai, L.; Machaty, Z.; Sun Qing, Y.; Day, B.N.; Prather, R.S. (2001). Development and expression of the green fluorescent protein in porcine embryos derived from nuclear transfer of transgenic granulosa derived cells. Animal Reproduction Science 68 (1-2): 111-120. ISSN: 0378-4320.

NAL Call No.: QP251 A5.

Keywords: nuclear transfer techniques, cloning, somatic cells, granulosa derived cells, in vitro, reproductive system, oocyte, green fluorescent protein, assisted reproduction method, molecular genetic method, cleavage rate, gene expression.


Pena, F.J.; Gil, M.C.; Pena, F. (2001). Effect of vulvomucosal injection of D cloprostenol at weaning and at insemination on reproductive performance of sows during the low fertility summer season under field conditions. Animal Reproduction Science 68 (1-2): 77-83, ISSN: 0378-4320.

NAL Call No.: QP251 A5.

Keywords: sows, D cloprostenol, fertility drug, hormone, prostaglandin F 2 alpha analogue, vulvomucosal administration, litter size, reproductive performance, seasonality, summer.


Prunier, A.; Guadarrama, C.A.M.; Mourot, J.; Quesnel, H. (2001). Influence of feed intake during pregnancy and lactation on fat body reserve mobilisation, plasma leptin and reproductive function of primiparous lactating sows. Reproduction Nutrition Development 41 (4): 333-347, ISSN: 0926-5287.

Keywords: sows, breed, Large White x Landrace, lactating, restricted versus ad libitum feeding, backfat thickness, body fat reserves, energy balance, feed intake, lactation, lipogenesis, live weight, milk production, neck fat, pregnancy, reproductive performance, nutrition, gonadotrophin, secretion, leptin, lipids, acetyl coenzyme A carboxylase, glucose 6 phosphate dehydrogenase, luteinizing hormone, malic enzyme.


Ramesh, V.; Saseendran, P.C.; Thomas, C.K. (2001). Effect of housing systems on the reproductive performance of sows. Indian Journal of Animal Sciences 71 ( 4 ): 378-380, ISSN: 0367-8318.

NAL Call No.: 41.8 IN22.

Abstract: An experiment was conducted to find out the effect of 3 types of housing systems namely, conventional house with wallowing tank (Control T1), conventional house with sprinklers (T2) and range system (T3) on the reproductive performance of sows wherein 18 were reared under each system. A significantly lower (P<0.01) air temperature was observed in sprinkler system (33.0 deg C) and range (34.35 deg C). There was no significant difference in relative humidity between the groups. The weight of sows at the time of breeding, one week after farrowing and at weaning were significantly lower (P<0.05) in treatment group T2 (95.55 plus or minus 2.38, 116.58 plus or minus 4.5 and 110.27 plus or minus 4.43 kg, respectively) when compared to T3(111.58 plus or minus 7.48, 138.97 plus or minus 8.32 and 129.54 plus or minus 8.22 kg, respectively) and T1 (114.44 plus or minus 4.56, 141.14 plus or minus 6.67 and 137.36 plus or minus 6.41 kg, respectively). Significantly higher (P<0.01) percentage of oestrus occurrence, breeding success and intensity of oestrus were observed in T2 and T3 groups than T1 group. The gestation length and postweaning oestrus period were similar. The litter size at birth and weaning in T3(9.38 plus or minus 0.33 and 6.92 plus or minus 0.05) and T2(9.11 plus or minus 0.31 and 6.44 plus or minus 0.34) sows were significantly (P<0.01) higher than T1(7.09 plus or minus 0.68 and 4.63 plus or minus 0.70, respectively). Between T2 and T3 there was no significant difference. The litter weight at birth and weaning (14.35 plus or minus 0.52 kg and 63.84 plus or minus 4.04kg), respectively, in T3 group of sows were found to be significantly (P<0.01) higher than T1. In the present study the reproductive performance of pigs maintained under sprinkler under conventional system. 13 ref.

Keywords: sows, housing, relative humidity, temperature, comparisons, conventional house with wallowing tank, conventional house with sprinklers, range system, reproductive performance, litter size, litter weight, estrus, pregnancy, weaning weight.

Copyright© 2002, CAB International


Rehfeldt, C.; Kuhn, G.; Nuernberg, G.; Kanitz, E.; Schneiders, F.; Beyer, M.; Nuernberg, K.; Ender, K. (2001). Effects of exogenous somatotropin during early gestation on maternal performance, fetal growth, and compositional traits in pigs. Journal of Animal Science 79 (7): 1789-1799, ISSN: 0021-8812.

NAL Call No.: 49 J82.

Keywords: gilts, porcine somatotropin, injected, maternal performance, early gestation, effects on embryonic survival, fetal development, fetal growth, embryonic weight, fetal weight, neonatal weight, reproductive system, endometrium, placenta, glucose, nutrient transfer, proteins, animal compositional traits, analysis.


Romar, R.; Coy, P.; Campos, I.; Gadea, J.; Matas, C.; Ruiz, S. (2001). Effect of co culture of porcine sperm and oocytes with porcine oviductal epithelial cells on in vitro fertilization. Animal Reproduction Science 68 (1-2): 85-98, ISSN: 0378-4320.

NAL Call No.: QP251 A5.

Keywords: reproductive system, oocyte, semen, monospermy, concentration, frozen thawed, in vitro fertilization, assisted reproduction method, oviductal epithelial cell.


Sato, E.; Kimura, N.; Saeki, K.; Yokoo, M.; Sasada, H. (2001). Development of a gene modified pig by means of a somatic cell clone technique. Journal of Reproduction and Development 47 (Suppl. 1): S27-S33, ISSN: 0916-8818.

NAL Call No.: SF1 K3.

Keywords: transgenics, oocyte, nuclear transfer, assisted reproduction method, somatic cell clone technique, cytogenetic method.


Shrestha, N.P.; Edwards, S.A.; English, P.R.; Robertson, J.F. (2001). An evaluation of boar pheromone spray to aid the stimulation and detection of estrus in small farms in Nepal. Asian Australasian Journal of Animal Sciences 14 (5): 697-700, ISSN: 1011-2367.

NAL Call No.: SF55 A78A7.

Keywords: boar, sows, estrus detection, boar pheromone spray, farrowing interval, weaning to remating interval, farrowing interval, lactation, reproductive efficiency, village conditions, Nepal.


Singleton, W. L. (2001). State of the art in artificial insemination of pigs in the United States. Theriogenology 56 (8):1305-1310, ISSN: 0093-691X.

NAL Call No.: QP251 A1T5.

Keywords: breeding, sires, genetically superior, husbandry, breeding management. artificial insemination, semen, semen production, collection, evaluation, processing, USA.


Tantasuparuk, W.; Dalin, A.M.; Lundeheim, N.; Kunavongkrit, A.; Einarsson, S. (2001). Body weight loss during lactation and its influence on weaning to service interval and ovulation rate in Landrace and Yorkshire sows in the tropical environment of Thailand. Animal Reproduction Science 65 (3-4): 273-281, ISSN: 0378-4320.

NAL Call No.: QP251 A5.

Keywords: sows, breed, Landrace, Yorkshire, tropical climate, ovulation rate, weaning to service interval, body weight loss, lactation length, number of total born piglets, number of live born piglets, litter birth weight, average piglet birth weight, number of pigs weaned, litter weaning weight, average pig weaned weight, ovulation rate, Thailand.


Tummaruk, P.; Lundeheim, N.; Einarsson, S.; Dalin, A.M. (2001). Effect of birth litter size, birth parity number, growth rate, backfat thickness and age at first mating of gilts on their reproductive performance as sows. Animal Reproduction Science 66 (3-4): 225-237, ISSN: 0378-4320.

NAL Call No.: QP251 A5.

Keywords: gilts, reproductive performance, influence of birth litter size, birth parity number, performance test parameters, age at first mating, backfat thickness, birth litter size, birth parity number, farrowing rate, first mating age, growth rate, remating rate, weaning to first service interval.


Tummaruk, P.; Lundeheim, N.; Einarsson, S.; Dalin, A.M. (2001). Repeat breeding and subsequent reproductive performance in Swedish Landrace and Swedish Yorkshire sows. Animal Reproduction Science 67 (3 4): 267-280, ISSN: 0378-4320.

NAL Call No.: QP251 A5.

Keywords: gilts, sows, breed, Swedish Landrace, Swedish Yorkshire, repeat breeding, reproductive performance, parity number, boar breed, season, mating type, return to estrus, litter size.


Tummaruk, P.; Lundeheim, N.; Einarsson, S.; Dalin, A.M. (2001). Reproductive performance of purebred Hampshire sows in Sweden. Livestock Production Science 68 (1): 1-12, ISSN: 0301-6226.

NAL Call No.: SF1.L5

Keywords: sows, breed, Hampshire, reproductive performance, age at first farrowing, parity influence, farrowing rate, seasonal variation, fertility, lactation length, litter size, remating rate, weaning to first service interval.



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