CAS: 6533-00-2
Formula: C21H28O2
Molecular Weight: 312.45
Synonyms: 13-Ethyl-17A-ethynyl-17b-hydroxy-4-gonen-3-one; DL-Norgestrel; Methylnorethindrone; A-Norgestrel;
EINECS: 229-433-5
Density: 1.139 g/cm3
Melting Point: 239-241 ° C(lit. )
Boiling Point: 459.139 ° C at 760 mmHg
Flash Point: 195.446 ° C
Appearance: White solid
Purity: 99%

Norgestrel binds to the progesterone and estrogen receptors. Target cells include the female reproductive tract, the mammary gland, the hypothalamus, and the pituitary. Once bound to the receptor, progestins like Norgestrel will slow the frequency of release of gonadotro releasing horm (GnRH) from the hypothalamus and blunt the pre-ovulatory L H (lutei hormone)

Norgestrel, a synthetic progesterone analog , is a racemic mixture of which levonorgestrel is the biologically active component. Levonorgestrel prevents pregnancy by inhibiting ovulation and by causing the cervical mucous to thicken, which makes it harder for sperm to move toward the uterus.

Norgestrel is used to prevent pregnancy. It is often referred to as the "mini-pill" because it does not contain any estrogen. Norgestrel (a form of progestin) is a hormone that prevents pregnancy by changing the womb and cervical mucus to make it more difficult for an egg to meet sperm (fertilization) or for the fertilized egg to attach to the wall of the womb (implantation). Regular use of the "mini-pill" prevents the release of an egg (ovulation) in about half of the women who use it.Norgestrel is usually used by women who cannot take estrogen. For the most effective results, it is very important to take this medication exactly as prescribed.