Long-term contraception by steroid-releasing implants. IV. Biological effectiveness of norethindrone acetate (ENTA) implants in rats and rabbits.
D000284:Administration, Oral; D000818:Animals; D002369:Castration; D004343:Drug Implants; D010064:Embryo Implantation / Q000187:drug effects; D005260:Female; D005298:Fertility / Q000187:drug effects*; D008098:Litter Size / Q000187:drug effects; D009640:Norethindrone / Q000008:administration & dosage / Q000494:pharmacology*; D009644:Norgestrel / Q000494:pharmacology; D010053:Ovary / Q000187:drug effects*; D011247:Pregnancy; D011817:Rabbits; D051381:Rats; D013997:Time Factors
D004343:Drug Implants; D009644:Norgestrel; D009640:Norethindrone