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Obstet Gynecol. 2009 Sep;114(3):616-22. doi: 10.1097/AOG.0b013e3181b46f54.

Rate of pregnancy after using drospirenone and other progestin-containing oral contraceptives.

Author information

  • 1Bayer Schering Pharma AG, M├╝llerstrasse 178, Berlin, Germany. maureen.cronin@bayerhealthcare.com

Abstract

OBJECTIVES:

To determine whether prior oral-contraceptive use has a negative effect on the ability of women to conceive in both the short-term and long-term.

METHODS:

The European Active Surveillance Study on Oral Contraceptives (EURAS-OC) was a controlled, prospective, noninterventional cohort study of 59,510 users of oral contraceptives containing drospirenone or other progestins in clinical practice in seven European countries. In a planned secondary analysis, pregnancy outcomes were investigated in 2,064 participants in EURAS-OC who stopped oral-contraceptive use after study entry because of planned pregnancy. The influence of age, parity, progestin type, ethinylestradiol dose, duration of oral-contraceptive use, and smoking status on the rate of pregnancy was assessed.

RESULTS:

Overall, 21.1% (95% confidence interval [CI] 19.4-23.0%) of the past oral-contraceptive users were pregnant one cycle after oral-contraceptive cessation. This rate increased to 79.4% (95% CI 77.6-81.1%) at 1 year (13 cycles). Progestin type, ethinylestradiol dose, duration of oral-contraceptive use, and parity had no major influence on the rate of pregnancy after oral-contraceptive cessation. Up to age 35 years, age had only a minor influence on the rate of pregnancy. Rates of pregnancy were reduced in women older than 35 years and in current smokers.

CONCLUSION:

Previous oral-contraceptive use does not negatively affect initial and 1-year rates of pregnancy after oral-contraceptive cessation. A comparison of these data with data external to this study indicates that the negative effect of aging on fecundity is not amplified by oral-contraceptive use.

LEVEL OF EVIDENCE:

II.

PMID:
19701043
[PubMed - indexed for MEDLINE]
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