Abstract
Summary
A differential assay is described for testing compounds with hamsters which allows one to separate anti-implantation and antimating behavior effects from influences exerted at the time of capacitation and fertilization. Such tests with chlormadinone and megestrol acetate emphasize the effects of these compounds on the later phenomenon. Demonstration that the first phase of rabbit sperm capacitation occurs readily in 12 hr in the hamster uterus indicates the usefulness of this animal for cross-species studies of capacitation.
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