Clinical and endocrine responses to embryonic and fetal death induced by manual rupture of the amniotic vesicle during early pregnancy in cows.

摘要: Pregnancy was terminated in 4 cows by manual rupture of the amniotic vesicle on day 41 (n = 1) and 46 3) after insemination. Each cow necropsied 36 days rupture, which time only one had come into estrus. Luteal activity, monitored daily plasma progesterone assay, still evident 2 35 fetal death; remaining cows, regression corpus luteum (CL) achieved at 28 32 days, respectively. Uterine release prostaglandin F2 alpha (PGF2 alpha), measured as 15-keto metabolite (PGFM) PGF2 alpha, a sampling schedule; specimens were obtained every hours. There no appreciable releases associated with death. The first episodic form seen conjunction CL regression. In all palpable membrane slip for 18 vesicle, although that time, uterine resilience diminished subsequently regressed. After uterus noticeably edematous fluid-filled cows; 1 regressed CL, returned to prepregnancy size tone 33.(ABSTRACT TRUNCATED AT 250 WORDS)