Estrogen conditioning and progesterone facilitation of lordosis in guinea pigs.
D000818:Animals; D004958:Estradiol / Q000494:pharmacology*; D004971:Estrus; D005260:Female; D006168:Guinea Pigs; D010053:Ovary / Q000502:physiology / Q000601:surgery; D011247:Pregnancy; D011374:Progesterone / Q000008:administration & dosage / Q000494:pharmacology*; D012726:Sexual Behavior, Animal / Q000187:drug effects*; D013997:Time Factors
D011374:Progesterone; D004958:Estradiol