The failure of progesterone to affect myometrial activity in the guinea-pig.
D000818:Animals; D004971:Estrus; D005260:Female; D006168:Guinea Pigs; D008365:Manometry; D008525:Medroxyprogesterone / Q000008:administration & dosage*; D009119:Muscle Contraction / Q000187:drug effects; D010121:Oxytocin / Q000494:pharmacology; D011247:Pregnancy; D011270:Pregnancy, Animal / Q000187:drug effects*; D011374:Progesterone / Q000008:administration & dosage*; D014599:Uterus / Q000187:drug effects* / Q000502:physiology
D011374:Progesterone; D010121:Oxytocin; D008525:Medroxyprogesterone