Fertility and sperm transport in Merino ewes at the first oestrus following embryonic death.

Abstract

The embryos of ewes were killed with colchicine on Day 17 of gestation and the ewes were mated at the subsequent oestrus. Fertility was reduced at this mating, and fewer spermatozoa were found in the uterus and oviducts than in control animals. The total number of spermatozoa in the cervix and their distribution between the lumen and walls of the cervix… (More)

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