Taking birth control pills can cause weight gain. Long-term use of birth control pills can lead to menstrual disorders, most of which can cause low menstrual flow and severe amenorrhea. Amenorrhea and endocrine disorders can cause obesity. Therefore, the pill is not recommended to be taken for a long time. 80% of women in the country use the method is with the ring to contraception, rarely will use the pill to contraception. If you take the pill regularly, it is not a big problem once in a while or twice, but long-term use will reduce ovarian function and cause low menstrual flow. Especially long-acting birth control pills, the side effects are particularly strong. If you take long-acting contraceptive pills, you can have children only after you have stopped taking them for six months. Long-acting contraceptives have a great impact on the human body, and without special circumstances, long-acting contraceptives are not recommended. You can take short-acting or emergency pills to achieve the purpose of contraception. After taking the pill, menstrual changes are obvious, must stop the pill, and then slowly adjust for a period of time to see if the menstruation or body can return to normal.