Question

how do oral pills function as contraceptive

Answer 1

oral pills possess hormones progesterone which cause no ovulation

Answer 2

Oral contraceptives (birth-control pills) are used to prevent pregnancy. Estrogen and progestin are two female sex hormones. Combinations of estrogen and progestin work by preventing ovulation (the release of eggs from the ovaries). ... Some brands of oral contraceptives are also used to treat acne in certain patients.