3d image of levonorgestrel butanoate skeletal formula

levonorgestrel butanoate lng-b hrp-002 progestogen progestogen ester steroidal progestin 19-nortestosterone world health organization injectable contraceptive prodrug injection contraceptive men hypogonadism amenorrhea oral 3d contraception birth control hormonal contraceptives mother gynecology obstetrics woman motherhood birth fertility fertility medicine reproduction reproductive female sex hormone menopausal hormone therapy gynecological conditions pregnancy art assisted reproductive technology infertility hormonal replacement function action endocrine endocrinology level