progestogen(n = noun.substance) progestin - any of a group of steroid hormones that have the effect of progesterone;
is a kind of sex hormone, steroid, steroid hormone
has particulars: lipo-lutin, progesterone, megestrol, megestrol acetate, norethandrolone, norethindrone, norethindrone acetate, norlutin, norethynodrel, norgestrel, medroxyprogesterone, provera

progestogen, n.
1 any of a group of steroid hormones (including progesterone) that maintain pregnancy and prevent further ovulation during it.
2 a similar hormone produced synthetically.