ovulen

Ovulen is a brand name used for one or more formulations of combined oral contraceptive pills. In many markets, Ovulen-28 is the best-known version, supplied as a 28-day pack with a sequence of active pills and either placebo or no inactive pills; other versions follow a 21-days-on/7-days-off pattern.

Each formulation combines an estrogen with a progestin; the estrogen is typically ethinyl estradiol and the progestin varies by version and country (for example levonorgestrel or norethindrone). The pills are intended for daily use to prevent pregnancy and to regulate the menstrual cycle.

Typical regimens involve taking one pill per day, with 21 days of active pills followed by a break or a continuous 28-day cycle, depending on the product. The mechanism includes suppression of ovulation, thickening of cervical mucus, and changes to the endometrium.

Historically, Ovulen and related products were introduced in the late 20th century and are marketed by various companies; availability and formulations vary by country. Availability and specific formulations vary by country and regulatory approval.

Common side effects include nausea, breast tenderness, headaches, and mood changes; serious risks include thromboembolism in some users. The product is contraindicated in pregnancy and in women with certain cardiovascular, liver, or clotting disorders.

See also: Combined oral contraceptive, estrogen, progestin.