title: Study of Norplant implants in Shanghai: three-year experience.
abstract: A clinical follow-up study conducted in Shanghai, China confirmed earlier reports that the Norplant implants, Norplant-1 and Norplant-2, are both highly effective with high continuation rates. The implants, however, tend to cause menstrual disturbance, spotting and bleeding. The mean hemoglobin value, however, did not change and the blood pressure remained stable. The report of 8 cases of thrombocytopenia among 301 Norplant-2 users is a source of concern.
authors.affiliation: Gynecology and Obstetrics Hospital, Shanghai Medical University, China.
authors.forename: M K
authors.initials: MK
authors.lastname: Du
authors.forename: H M
authors.initials: HM
authors.lastname: Zheng
authors.forename: H C
authors.initials: HC
authors.lastname: Chen
authors.forename: L P
authors.initials: LP
authors.lastname: Chow
mesh_terms: D000328:Adult; D002681:China; D003271:Contraceptive Agents, Female / Q000009:adverse effects; D004341:Drug Evaluation; D004343:Drug Implants; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D016912:Levonorgestrel; D008599:Menstruation Disturbances / Q000139:chemically induced; D009644:Norgestrel / Q000009:adverse effects; D013921:Thrombocytopenia / Q000139:chemically induced; D013997:Time Factors
chemical_list: D003271:Contraceptive Agents, Female; D004343:Drug Implants; D009644:Norgestrel; D016912:Levonorgestrel