What chemicals are in the contraceptive pill?

The contraceptive pill typically contains synthetic hormones, primarily estrogen and progestin. Common formulations include ethinyl estradiol (a form of estrogen) and various types of progestin, such as levonorgestrel or norethindrone. Some pills may also contain additional ingredients like iron or folic acid, as well as inactive ingredients that aid in the pill's formulation and stability. These hormones work together to prevent ovulation, thicken cervical mucus, and thin the uterine lining.