Relationship between size of the ovulatory follicle and pregnancy success in beef heifers.

@article{Perry2007RelationshipBS,
  title={Relationship between size of the ovulatory follicle and pregnancy success in beef heifers.},
  author={George A. Perry and Michael Smith and A. J. Roberts and Michael D Macneil and Tom W Geary},
  journal={Journal of animal science},
  year={2007},
  volume={85 3},
  pages={684-9}
}
Previous research indicated that the size of the ovulatory follicle at the time of insemination significantly influenced pregnancy rates and embryonic/fetal mortality after fixed-timed AI in postpartum cows, but no effect on pregnancy rates was detected when cows ovulated spontaneously. Our objective was to evaluate relationships of fertility and embryonic/fetal mortality with preovulatory follicle size and circulating concentrations of estradiol after induced or spontaneous ovulation in beef… CONTINUE READING

2 Figures & Tables

Connections & Topics

Mentioned Connections BETA
Heifers were inseminated in 1 of 2 breeding groups : ( 1 ) timed insemination after an estrous synchronization and induced ovulation protocol ( TAI n = 98 ) ; or ( 2 ) AI approximately 12 h after detection in standing estrus by electronic mount detectors during a 23-d breeding season ( spontaneous ovulation ; n = 110 ) .
Heifers were inseminated in 1 of 2 breeding groups : ( 1 ) timed insemination after an estrous synchronization and induced ovulation protocol ( TAI n = 98 ) ; or ( 2 ) AI approximately 12 h after detection in standing estrus by electronic mount detectors during a 23-d breeding season ( spontaneous ovulation ; n = 110 ) .
All Topics