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Seasonique Birth Control Pills

Seasonique™ (levonorgestrel/ethinyl estradiol) is a birth control pill that contains two different hormones. It is an "extended-cycle" oral contraceptive that provides more time between menstrual periods (you will only get your period once every three months).
Each pack of Seasonique birth control pills contains 91 tablets; the first 84 contain estrogen and progestin, while the last 7 contain only a low dose of estrogen. It is thought that this low dose of estrogen may reduce the chance of breakthrough bleeding (bleeding in between periods).
Seasonique works to prevent pregnancy primarily by stopping ovulation (the maturation and release of eggs from the ovaries). However, it also prevents pregnancy in two other, minor ways. The birth control pill alters the cervical mucus (the fluid of the cervix, which is the lower, narrow part of the uterus that is connected to the vagina), making it more difficult for sperm to enter the uterus.
In addition, this medication alters the lining of the uterus (called the endometrium), making it less receptive to an embryo.
(Click Seasonique for more information on how the birth control pill Seasonique works to prevent pregnancy, to find out exactly when and how to take this drug, and to learn about the potential side effects of this contraceptive.)
Last reviewed by: Arthur Schoenstadt, MD
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