Contraceptives are divided into many kinds, some types of contraceptives to eat more or take a long time easy to cause obesity, short-acting contraceptives are safer, can regulate the endometrium regular shedding, no sodium retention will not cause obesity. Containing progestin high birth control pills, after taking may cause a short period of time water and sodium retention symptoms of obesity. Some take the pill after regulating the endocrine, appetite increase, there is the possibility of causing obesity. There are many types of contraceptives currently in use, which are divided into short-acting contraceptives, long-acting contraceptives and family visit contraceptives. The composition of contraceptives mainly contains estrogen and progesterone, and the dosage of estrogen and progesterone contained in different types of contraceptives is different.