(Ormeloxifene), Is Sevista the answer for young women who would like to take the pill but have trouble with side effects? Unless you live in India, you might not even have heard of this weekly birth control pill. Usually, increased doses of estrogen stop a woman’s ovaries from releasing an egg. However, by blocking estrogen in the uterus, Sevista alters the uterus’ lining, which prevents a fertilised egg from implanting. ©