[Effect of different estro-progesterone sequences on nidation of dormant blastocysts administered in diapause in ovariectomized rats].
The hormonal condition permitting delayed nidation in rats ovarectomized on day 4 or 5 of pregnancy was studied by administering progesterone and estradiol in differents sequences between days 9 and 14. The best result was obtained when progesterone was given 3 days before an estrogen-progesterone association. The same treatment induced delayed nidation in rats receiving Reserpine and ovariectomized day 5, but not when progesterone and estradiol were present day 4.
D000818:Animals; D001755:Blastocyst / Q000187:drug effects / Q000502:physiology*; D002369:Castration; D010064:Embryo Implantation / Q000187:drug effects*; D004958:Estradiol / Q000494:pharmacology*; D005260:Female; D011247:Pregnancy; D011374:Progesterone / Q000494:pharmacology*; D051381:Rats; D012110:Reserpine / Q000494:pharmacology; D013997:Time Factors
D011374:Progesterone; D004958:Estradiol; D012110:Reserpine
Action, chez la ratte, de différentes séquences oestro-progestéroniques, sur la nidation retardée des blastocystes mis en diapause par ovariectomie.