Long-term contraception by steroid releasing implants. VI. Serum concentrations of norethindrone in women bearing a single silastic implant releasing norethindrone acetate.
D000328:Adult; D001682:Biological Availability; D004343:Drug Implants; D005260:Female; D006801:Humans; D009640:Norethindrone / Q000031:analogs & derivatives / Q000494:pharmacology*; D013997:Time Factors
D004343:Drug Implants; D009640:Norethindrone