Estrous response and pregnancy rates are decreased for cows given Syncro-Mate-B (SMB) during metestrus (Day 1 to 5 of an estrous cycle). Data indicate these decreases are due, in part, to retention of a functional corpus luteum (CL). Our objective
Using two PGF(2α) treatments 14 days apart as a way to enhance estrus detection rate following the 2nd treatment is a reproductive management tool that continues to be used on large dairy farms. In one study, in cows with a
American journal of veterinary research, 62(8), 1285-1289 (2001-08-11)
To determine whether administration of a microdose of prostaglandin at the BAI HUI acupuncture point offers any advantage over IM injections for luteolysis, ovulatory interval, or systemic response in mares. 17 mature cycling mares, 3 to 20 years of age
In three experiments we studied the baseline and changes in VER during different natural estrous cycle stages (n=146) in ovarian structures and in plasma progesterone during estrus induced by prostaglandin injection (n=16) and the VER at insemination (n=90) in an
Biology of reproduction, 65(6), 1710-1717 (2001-11-22)
Recent evidence in the cow suggests that endothelin-1 (ET-1) plays a role during prostaglandin (PG) F(2alpha)-induced luteal regression. We have examined the effects of treatment with PGF(2alpha) during the early and midluteal phases on three components of the endothelin system:
