Definition
progestogen: One of a group ofnaturally occurring or synthetic hormonesthat maintain the normalcourse of pregnancy. The best knownis progesterone. In high dosesprogestogens inhibit secretion ofluteinizing hormone, thereby preventingovulation, and alter the consistencyof mucus in the vagina sothat conception tends not to occur.They are therefore used as majorconstituents of oral contraceptives.
