Effects of lactation length and an exogenous progesterone and estradiol-17beta regimen during embryo attachment on endogenous steroid concentrations and embryo survival in sows.

@article{Belstra2002EffectsOL,
  title={Effects of lactation length and an exogenous progesterone and estradiol-17beta regimen during embryo attachment on endogenous steroid concentrations and embryo survival in sows.},
  author={B. A. Belstra and Mark A. Diekman and Brian Thomas Richert and Wayne L. Singleton},
  journal={Theriogenology},
  year={2002},
  volume={57 8},
  pages={2063-81}
}
The hypotheses that short lactation lengths increase embryo mortality by altering endogenous post-weaning steroid concentrations, and that an exogenous steroid regimen during embryo attachment might increase embryo survival were tested using 36 s parity sows assigned randomly to a 2 x 2 factorial. Sows were subjected to either a short lactation (SL, 13.0 days, n = 25) or a long lactation (LL, 31.5 days, n = 11), artificially inseminated at first estrus and treated daily with 2 ml i.m. of either… CONTINUE READING