What are the differences between combined oral contraceptives and progestin-only pills in terms of their hormonal composition, mechanism of action and overall effectiveness?
Gaurav ChauhanContributor
What are the differences between combined oral contraceptives and progestin-only pills?
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Combined oral contraceptives include estrogen and progestin, which prevent ovulation and thicken cervical mucus. Progestin-only pills mainly thicken cervical mucus and thin the uterine lining. Both are over 90% effective in preventing pregnancy.
Combined oral contraceptives contain estrogen and progestin, which inhibit ovulation and thicken cervical mucus. Progestin-only pills thicken cervical mucus and thin the uterine lining but may not always suppress ovulation. Both are over 90% effective with proper use.