The effects of dietary monensin sodium upon superovulation and embryo viability from mature cows.
Twelve mature British crossbred cows were randomly divided into two equal groups. Group A was fed no monensin while group B received 200 mg/head/day. Superovulation with follicle stimulating hormone (FSH) was attempted in all cows between days 9 and 11 of the estrous cycle. The number of corpora lutea per treated cow was significantly greater (P<0.05) than in controls. The number of ova recovered per cow was not significantly different between the two groups. Mean total luteal weight was significantly greater for monensin-treated cows. Embryo viability was determined using fluorescein diacetate (FDA) and was found to be similar in both groups.
Ortuno
A M
AM
Large Animal Medicine and Surgery, School of Veterinary Medicine, Auburn University, AL 36849, USA.
Carson
R L
RL