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Abstract

The aim of using Ovsynch protocol in true anestrus buffalo heifers (n=11) was to induce synchronized ovulatory estrus and thereafter, to assess the first service conception rate. 'Ovsynch' involved administration of a GnRH-analogue at days 0 and 9, and a PGF analogue on day 7. Transrectal ovarian ...

Author(s)
Ghuman, S. P. S.; Jagir Singh; Honparkhe, M.; Dadarwal, D.
Publisher
Indian Society for Study of Animal Reproduction (ISSAR), Chennai, India
Citation
Indian Journal of Animal Reproduction, 2009, 30, 2, pp 1-5
Abstract

Objectives were to determine effects of lactation and pregnancy on endometrial gene expression on d 17 of the estrous cycle and pregnancy. Heifers (n=33) were assigned randomly after parturition to lactating (L, n=17) or nonlactating (NL, n=16) groups. Cows were subjected to an ovulation...

Author(s)
Cerri, R. L. A.; Thompson, I. M.; Kim, I. H.; Ealy, A. D.; Hansen, P. J.; Staples, C. R.; Li, J. L.; Santos, J. E. P.; Thatcher, W. W.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2012, 95, 10, pp 5657-5675
Abstract

An experiment was conducted to investigate the effect of different doses of follicle stimulating hormone (FSH) used in a superovulation program on numbers of corpora lutea, total ova/embryos and transferable embryos in Kamphaeng Saen beef cattle. Cyclic cows (n=3) and heifers (n=3) of Kamphaeng...

Author(s)
Nilchuen, P.; Rattanatabtimtong, S.; Chomchai, S.
Publisher
Prince of Songkla University, Hat Yai, Thailand
Citation
Songklanakarin Journal of Science and Technology, 2011, 33, 6, pp 679-683
Abstract

Our objectives were to identify stages of the oestrous cycle at which initiation of a timed artificial insemination (Ovsynch/TAI) protocol may reduce pregnancy rates and to monitor ovarian follicle dynamics and corpus luteum (CL) development after initiation of the Ovsynch/TAI protocol at different ...

Author(s)
Moreira, F.; Sota, R. L. de la; Diaz, T.; Thatcher, W. W.
Citation
Journal of Animal Science, 2000, 78, 6, pp 1568-1576
Abstract

The association between conception rate at first service and numbers of follicles developed during a follicular wave was examined in 102 suckled beef cows and 14 heifers. Follicular development was monitored using ultrasonography for either two (trial 1) or three (trial 2) consecutive oestrous...

Author(s)
Starbuck-Clemmer, M. J.; Hernandez-Fonseca, H.; Ahmad, N.; Seidel, G.; Inskeep, E. K.
Publisher
Blackwell Publishing, Berlin, Germany
Citation
Reproduction in Domestic Animals, 2007, 42, 4, pp 337-342
Abstract

Two experiments evaluated long-term controlled internal drug release (CIDR) insert-based protocols to synchronize estrus and compare differences in their potential ability to facilitate fixed-time artificial insemination (FTAI) in beef heifers. In Experiment 1 estrous cycling heifers (n=85) were...

Author(s)
Leitman, N. R.; Busch, D. C.; Mallory, D. A.; Wilson, D. J.; Ellersieck, M. R.; Smith, M. F.; Patterson, D. J.
Publisher
Elsevier, Amsterdam, Netherlands
Citation
Animal Reproduction Science, 2009, 114, 4, pp 345-355
Abstract

Repeat-breeder heifers (RBH) have been shown to present reproductive perturbations during spontaneous cyclicity, which affects oestrus and ovulation. Some of these disturbances (e.g. deviating hormone patterns) are also present during and after cycles of twice-weekly ovum pick-up (OPU), performed...

Author(s)
Bǻge, R.; Petyim, S.; Larsson, B.; Hallap, T.; Bergqvist, A. S.; Gustafsson, H.; Rodríguez-Martínez, H.
Publisher
CSIRO Publishing, Collingwood, Australia
Citation
Reproduction, Fertility and Development, 2003, 15, 2, pp 115-123
Abstract

The objective of this study was to determine the effects of low versus physiologic plasma progesterone concentrations during the ovulatory wave on fertility in cattle. Suckled beef cows (Bos taurus; n=129) and pubertal heifers (Bos taurus; n=150) at random stages of the estrous cycle were given a...

Author(s)
Pfeifer, L. F. M.; Mapletoft, R. J.; Kastelic, J. P.; Small, J. A.; Adams, G. P.; Dionello, N. J.; Singh, J.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2009, 72, 9, pp 1237-1250
Abstract

One of the major sources of success in embryo transfer is timing of AI relative to the LH surge and ovulation. The aim of this study was to compare the embryo production following superovulation during a PGF (control cycle) or a CIDR-B synchronized cycle (CIDR-B cycle) in 12 sexually mature...

Author(s)
Lafri, M.; Ponsart, C.; Nibart, M.; Durand, M.; Morel, A.; Jeanguyot, N.; Badinand, F.; Mari, K. de; Humblot, P.
Publisher
Elsevier Science Inc., New York, USA
Citation
Theriogenology, 2002, 58, 6, pp 1141-1151
Abstract

293 Anatolian cows housed in small barns were examined for infertility problems. The total incidence of reproductive problems in small barns was 44.70%. The conception rates were 68.5 and 51.2% for cows and heifers at first service, respectively. The incidence of delayed ovulation, cystic ovarian...

Author(s)
Kaya, M.; Gulyuz, F.; Tasal, I.; Uslu, B. A.
Publisher
Indian Veterinary Association, Chennai, India
Citation
Indian Veterinary Journal, 2005, 82, 9, pp 957-958

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