Influence of the oviduct on sperm capacitation in the XXXX .

@entity1 @entity12179 @entity95
In an effort to evaluate the influence of the oviduct on sperm capacitation, in vitro fertilization of freshly-ovulated @entity95 ova was used to assay the fertilizing ability of @entity12179 . New Zealand white @entity95 were used. 9 1/2 hours after injection of @entity1 chorionic gonadotrophin half the animals had fimbriae of both tubes resected; 2 hours later, the ovaries were excised and the ova in cumulus removed from the surface of the ovaries. Half the animals serving as donors of uterine @entity12179 had their oviducts removed; half were intact. Both had @entity12179 recovered from their uteri 6-48 hours after mating. Study technique is detailed. Studies of 617 ova showed best fertilization rates when @entity12179 had remained in the uteri 16-18 hours. Spermatozoa recovered from capacitators without oviducts produced similar cleavage rates as those with intact oviducts. Results indicate that @entity12179 can be capacitated in the uterus of @entity95 without oviducts but it is possible that part of the capacitation normally takes place in the oviducts. Others have shown capacitation takes longer by several hours with the uterotubal junction ligated than when this junction is patent. Ova were fertilized by @entity12179 recovered from the uterus after 8 hours but not by those recovered after 6 hours. In the present experiment @entity12179 recovered from the uterus 36 hours postcoitus were still able to fertilize ova.
