[Infertility of the hamster oocyte having matured in vitro].
The comparative study of fertilization, with the same sperm sample, of in vitro matured oocytes and freshly ovulated ones, shows a new aspect of mammalian oocyte maturation. While 80% of freshly ovulated oocytes are fertilized, in vitro matured eggs are not fertilizable. They present the ability to be penetrated by spermatozoa 4 to 6 hrs. only after HCG injection. This is therefore not on tubal influence but depends on an oocyte specific factor which appears during the end of intrafollicular maturation.
D000818:Animals; D006224:Cricetinae / Q000502:physiology*; D005187:Fallopian Tubes / Q000502:physiology; D005260:Female; D005306:Fertilization; D066298:In Vitro Techniques; D008647:Mesocricetus / Q000502:physiology*; D009865:Oocytes / Q000502:physiology*; D009866:Oogenesis; D006080:Ovarian Follicle / Q000502:physiology; D010063:Ovum / Q000502:physiology*
Infécondabilité de l'ovocyte de Hamster ayant fait sa maturation in vitro