What are progestin-only pills?
Progestin-only pills contain just one hormone, a progestin. They work by making cervical mucus thicker so sperm cannot get to the egg, and by making the lining of the uterus thinner. Sometimes they stop ovulation (release of an egg). Among typical couples who initiate the use of progestin-only pills about eight percent of women will experience accidental pregnancy in the first year. But if these pills are used consistently and correctly, just three in 1000 women will become pregnant. For protection from HIV and increased protection from pregnancy, use condoms as well. Pills alone do not protect from STIs and HIV. Complete information about this contraceptive is available through a clinician or the package insert accompanying the specific pills you or your partner are taking. What are the advantages of choosing progestin-only pills? • Minipills do not have estrogen related side effects and can be taken by women who have had side effects or complications using estrogen-containing pills.
