Norgestrienone

Norgestrienone was used in hormonal contraception to prevent pregnancy. It has typically been used as an oral contraceptive at a dosage of 2 mg/day in combination with ethinylestradiol and 350 μ/day when used alone. ==Side effects==

Pharmacodynamics Norgestrienone has been found to possess similar affinity for the progesterone receptor and androgen receptor, and in accordance, has some androgenic activity. ==Chemistry==

Norgestrienone, also known as 17α-ethynyl-19-nor-δ9,11-testosterone or as 17α-ethynylestra-4,9,11-trien-17β-ol-3-one, as well as δ9,11-norethisterone or 17α-ethynyltrienolone (17α-ethynyltrenbolone), is a synthetic estrane steroid and a derivative of testosterone and 19-nortestosterone. It is structurally related to the anabolic steroid trenbolone (19-nor-δ9,11-testosterone; the non-17α-ethynylated analogue of norgestrienone), the progestogenic and androgenic steroid gestrinone (the 13β-ethyl variant or 18-methyl derivative of norgestrienone), and the anabolic steroid tetrahydrogestrinone (the 18-methyl and 17α-ethyl variant of norgestrienone). ==History==

Norgestrienone was first described in the literature in 1965. ==Society and culture==

Generic names Norgestrienone is the generic name of the drug and its . ==Research==

Norgestrienone has been studied for use in male hormonal contraception. == References ==