Effect of administration of prostaglandin F2 alpha on embryo recovery from the uterus on day 5 after ovulation in mares.

This research investigates the effect of a compound called prostaglandin F2 alpha on the recovery of embryos from the uterus of mares five days after ovulation. The study found no improvement in embryo recovery after administering this compound and also suggested that embryos may enter the uterus earlier than previously thought.

Study Design and Groups

• The research was conducted using ten mares that were divided into three groups: group A, group B, and group C.
• Group A had their uterine flush for embryo recovery on the seventh day after ovulation, the standard procedure.
• Group B were put through the same procedure but earlier, on the fifth day after ovulation to test if earlier recovery was viable.
• Group C also were flushed on day five, but had been treated with prostaglandin F2 alpha (10 mg, IM) on the third day. This was done to investigate the effect of this compound on embryo recovery.

Findings

• In terms of embryo recovery rates, the results were different for each group. Group A had a recovery rate of 6 out of 10, Group B had 2 out of 8, and Group C had no successful recovery.
• The researchers found that the embryo recovery rate for Group C was significantly lower than that for Group A. This suggests that the administration of prostaglandin F2 alpha did not enhance embryo recovery, and in fact seemed detrimental.
• Interestingly, the embryo recovery rate for Group B was not significantly different from Group A or Group C, indicating a similar rate of recovery to the standard day seven flush, and no worse than the prostaglandin treated mares. This suggests that the fifth day may be a viable alternative for embryo recovery.
• The 25% successful embryo recovery rate for group B suggests that embryos might enter the uterus earlier than previously believed, as some embryos could be recovered on day five.