One aspect of hormonal contraceptives' effect on the teenage body remains a mystery -- whether and how they modify the developing brain. New research in young rats links synthetic hormones found in ...

Hormonal birth control helps prevent pregnancy by stopping ovulation and blocking sperm. Nonhormonal methods work by physically blocking sperm or using spermicide. Hormonal options include pills, ...

Studies have suggested for decades that birth control pills containing both estrogen and progestogen — synthetic versions of female hormones — may slightly elevate one's risk of breast cancer. But ...