title: Control of estrus in gilts with a progestogen.
abstract: Two trials were conducted to evaluate the effectiveness of a synthetic progestogen, allyl trenbolone, for control of estrus and ovulation in gilts. Estrus was effectively synchronized with 33 of 38 gilts exhibiting estrus 2 to 7 days after last progestogen feeding. There was no effect on fertilization rate in gilts free of ovarian abnormalities. Ovulation rate was higher in gilts fed the progestogen in both Trial 1 (P less than .01) and Trial 2 (P less than .10). Progestogen treatment caused an increase (P less than .01) in the incidence of cystic follicles which resulted in a decrease (P less than .01) in conception rate in Trial 1.
mesh_terms: D000818:Animals; D004963:Estrenes / Q000378:metabolism*; D004971:Estrus / Q000187:drug effects*; D005260:Female; D006080:Ovarian Follicle / Q000473:pathology; D010060:Ovulation / Q000187:drug effects*; D011247:Pregnancy; D013552:Swine / Q000378:metabolism*; D014204:Trenbolone Acetate / Q000009:adverse effects / Q000031:analogs & derivatives / Q000378:metabolism*
chemical_list: D004963:Estrenes; C023445:altrenogest; D014204:Trenbolone Acetate