Norethisterone is an artificial and powerful progestogen hormone which stops uterine bleeding.It additionally has some androgenic outcomes and some weak oestrogenic activity. Naturally going on progestogens are the hormones that preserve the lining of the uterus. At the time before a period, the degree of progestogen hormone falls and this motives the lining of the uterus to be shed as the menstrual period. This book will show you everything you need...