oral ConTraCEPTIvES In general, oral contraceptives, also referred to as “birth control pills,” (referring to this method as simply “birth control” is inaccurate) are among the most popular reversible contraception methods (Hatcher et al., 2008). The first oral contraceptive appeared on the U.S. market over fifty years ago.
How Oral Contraceptives Work Oral contraceptives work in the same manner as all hormonal methods. Combination oral contraceptives contain both estrogen and progestin.
In addition to preventing ovulation, oral contraceptives cause a thick- ening of the mucus secreted by the cervix (Hatcher & Nelson, 2004). This thickening of the mucus sets up a barrier that is very difficult for sperm to penetrate.
Different brands of combination pills have varying doses of hormones.
The progestin-only “minipill” has approximately the same low failure rate as the combination (progestin and estrogen) pill (Hatcher & Trussell, 2008; De Melo, 2010). The main advantage of the progestin-only oral contraceptive pill is that it avoids some of the potential negative side effects associated with estrogen in the combination pill.
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