title: Ovulation detection following removal of levonorgestrel subdermal contraceptive implants.
abstract: The time to resumption of ovulation following the discontinuation of levonorgestrel subdermal implants (Norplant) was assessed in 10 women. A blood sample (2 ml) was taken at the time of Norplant removal and then twice weekly until the first evidence of ovulation (serum progesterone concentration greater than or equal to 5 ng/ml) was documented. Ovulation was resumed in 80% of the cases by 3 weeks and in all the cases by 7 weeks. Prompt return of ovulation following Norplant removal is an additional advantage of this mode of long-acting contraception.
mesh_terms: D000328:Adult; D003271:Contraceptive Agents, Female / Q000008:administration & dosage; D003692:Delayed-Action Preparations; D005260:Female; D006801:Humans; D016912:Levonorgestrel; D009644:Norgestrel / Q000008:administration & dosage; D010061:Ovulation Detection / Q000379:methods*; D011374:Progesterone / Q000097:blood; D013997:Time Factors
chemical_list: D003271:Contraceptive Agents, Female; D003692:Delayed-Action Preparations; D009644:Norgestrel; D011374:Progesterone; D016912:Levonorgestrel