3d image of levonorgestrel skeletal formula

levonorgestrel hormonal medication birth control combination control pills lng progestogen progestin emergency prevention pregnancy breast tenderness irregular menstrual bleeding progestogen-only pill pop progestin-only implants intrauterine devices ecps hormone therapy combined oral tablet menopausal transdermal patch skin replacement antigonadotropic rendering contraception contraceptives mother gynecology woman female sex hormone gynecological conditions infertility hormonal replacement function action endocrine endocrinology level prohormone analogue