The use of biodegradable norethisterone implants as a 6-month contraceptive system
Rivera, R.; Gaitan, J.R.; Ortega, M.; Flores, C.; Hernandez, A.
Fertility and Sterility 42(2): 228-232
1984
ISSN/ISBN: 0015-0282 PMID: 6745456 Document Number: 404565
The effects of a 6-month contraceptive system of biodegradable norethisterone (NET) implants on the menstrual cycle, estradiol and progesterone levels, the presence of side effects, its contraceptive effectiveness, and the NET levels achieved were studied in a group of nine women. There was practically no disruption of the menstrual cycle and no important side effects. Ovulation was inhibited in four subjects, and another four subjects remained ovulatory. In all the subjects a cyclic secretion of estradiol was maintained. No pregnancies occurred. The circulatory levels of NET were very stable throughout the 6-month period of implant use.