Singh K, Viegas O A, Ratnam S S
Department of Obstetrics and Gynaecology, National University Hospital, Singapore.
Contraception. 1992 May;45(5):453-61. doi: 10.1016/0010-7824(92)90158-p.
The Norplant-2 rod system consists of two silastic rods in which levonogestrel has been incorporated with the polymer. The continuation rate at the end of five year was 62%. No accidental pregnancies occurred throughout the five years of use. The post-removal conception rate in women desiring pregnancy was 70.8% at the end of two years. The majority of acceptors were happy with the rods and 86.8% expressed the desire to have another set of implants inserted following removal of the first set. The study shows the Norplant-2 rod system to be a well accepted method of family planning.
Norplant-2 棒系统由两根硅橡胶棒组成，左炔诺孕酮已与聚合物混合在其中。五年结束时的续用率为62%。在整个五年的使用期间未发生意外妊娠。有妊娠意愿的女性在取出后两年末的受孕率为70.8%。大多数使用者对该棒满意，86.8%的人表示在第一组植入物取出后希望再植入另一组。该研究表明Norplant-2棒系统是一种广泛接受的计划生育方法。
