1) Hormonal contraception 2) Progestin 3) Progestogen 
<chemical> (+-)-13-ethyl-17-hydroxy-18,19-dinorpregn-4-en-20-yn-3-one. A progestational agent with actions similar to those of progesterone. This racaemic or (+-)-form has about half the potency of the levo form (levonorgestrel). Norgestrel is used as a contraceptive and ovulation inhibitor and for the control of menstrual disorders and endom...
(nor-jes´trәl) a potent synthetic progestational agent used, alone or in combination with an estrogen component, as an oral contraceptive.
[n] - synthetic progestin used in oral contraceptives
noun synthetic progestin used in oral contraceptives
a synthetic progestin, CHO, used in some oral contraceptives either alone or in combination with an estrogen.