3d image of progesterone skeletal formula

progesterone progestogens progestagens gestagen endogenous steroid sex hormone menstrual cycle pregnancy embryogenesis metabolic intermediate neurosteroid contraception uterine cancer cervical hormone replacement therapy feminizing hormonal replacement function action endocrine endocrinology level prohormone analogue birth control hormonal oral contraceptives mother gynecology obstetrics woman motherhood fertility fertility medicine reproduction reproductive female menopausal gynecological conditions infertility 3d