Ulipristal is a selective progesterone receptor modulator used for the purposes of emergency contraception (Ella) and for the treatment of uterine fibroids (Fibristal). It is a derivative of 19-norprogesterone and has both antagonistic and partial agonist activity at the progesterone receptor.

Mimicking the action of progesterone, hydroxyprogesterone caporate binds to and activates nuclear progesterone receptors in the reproductive system and causes the ligand-receptor complex to be translocated to the nucleus where it binds to and promotes expression of target genes. Due to the negative feedback mechanism seen with progesterone, this agent also blocks luteinizing hormone (LH) […]

Medroxyprogesterone Acetate EP Impurity E is an impurity of Medroxyprogesterone Acetate, which is a progestin-type hormonal drug used in menopausal hormone therapy and progestogen-only birth control.

Medroxyprogesterone Acetate EP Impurity H is an impurity of Medroxyprogesterone Acetate, which is a progestin-type hormonal drug used in menopausal hormone therapy and progestogen-only birth control.

17alpha-hydroxyprogesterone is a 17alpha-hydroxy steroid that is the 17alpha-hydroxy derivative of progesterone. It has a role as a metabolite, a progestin, a human metabolite and a mouse metabolite. It is a 17alpha-hydroxy steroid, a 17alpha-hydroxy-C21-steroid and a tertiary alpha-hydroxy ketone. It is functionally related to a progesterone.

19-Norandrostenedione refers to two steroid isomers that were once marketed as dietary supplements and mainly used by body builders. After 2005, 19-Norandrostenedione was regulated in the United States as a schedule III controlled substance, as well as banned from use in competitive sports by the World Anti-Doping Agency. In the body 19-norandrostenedione is rapidly metabolized […]

Estra-4,9-diene-3,17-dione is an oxo steroid.