Ovarian activity and safety of a novel levonorgestrel/ethinyl estradiol continuous oral contraceptive regimen |
| |
Authors: | David F. Archer George Kovalevsky Susan A. Ballagh Gary S. Grubb |
| |
Affiliation: | aCONRAD Clinical Research Center, Department of Obstetrics and Gynecology, Eastern Virginia Medical School, Norfolk, VA 23507, USA;bWomen's Health, Clinical Research/Development, Wyeth Research, Collegeville, PA 19426, USA |
| |
Abstract: | BackgroundA continuous regimen of oral levonorgestrel (LNG) 90 mcg/ethinyl estradiol (EE) 20 mcg was evaluated for inhibition of ovulation, time to return to ovulation after stopping treatment and safety.Study DesignThis open-label study was conducted in healthy women aged 18-35 years. Ovulation was documented before treatment, and then participants received oral tablets containing LNG 90 mcg/EE 20 mcg to be taken continuously for three 28-day intervals. Ovarian activity was assessed three times per week during the treatment period with transvaginal ultrasound scans and measurements of serum 17β-estradiol, progesterone, follicle-stimulating hormone and luteinizing hormone concentrations. Safety assessments included physical examinations, laboratory evaluations and adverse event records.ResultsThirty-seven of the 58 subjects who received treatment met predefined criteria for efficacy analysis. No on-treatment ovulations occurred in the efficacy or intent-to-treat population. There was evidence of ovulation within 37 days of stopping treatment for 46 (98%) of 47 subjects evaluated posttreatment. The final subject with a history of polycystic ovarian syndrome ovulated by Day 66. The safety profile observed during this 84-day continuous regimen was similar to that seen with other low-dose oral contraceptives administered in a cyclic regimen.ConclusionsThe continuous LNG/EE regimen completely inhibited ovulation, with little evidence of follicular development and with rapid return of ovulatory capacity after stopping treatment. |
| |
Keywords: | Continuous oral contraception Ethinyl estradiol Levonorgestrel Ovulation inhibition and return Ovarian follicle suppression Ultrasound |
本文献已被 ScienceDirect 等数据库收录! |
|