Postpartum contraception is very necessary for postpartum mothers. There is always a possibility of pregnancy at any one time, and it is necessary to be prepared for contraception. Women should understand the contraceptive principles and methods of different contraceptives, and choose their own best means of contraception to avoid unwanted pregnancy. Once you start to resume sexual life after delivery, you need to use contraceptive methods. 21 days after delivery, some women’s ovaries may return to normal and ovulate, and some women discharge their eggs 5-8 weeks after delivery, at which time, if you have sex, you may become pregnant again. Many new mothers who do not know how to use contraception or have adopted incorrect contraceptive methods, rely on breastfeeding, natural contraception (extracorporeal spermulation, safe period contraception) often get pregnant accidentally a few months after giving birth to their babies, and can only go to the hospital to have an abortion. Ovulation can resume between about 3-8 months postpartum for those who are not fully breastfeeding, and even new mothers who are fully breastfeeding can have a pregnancy rate of more than 2%. Therefore, it is important to use contraception. You can get pregnant even if you are breastfeeding after delivery without menstruation. The time it takes for menstruation to return varies greatly from mother to mother, and is also related to the way the baby is fed; in the case of breastfeeding, menstruation may not return until breastfeeding is discontinued, but most mothers return to menstruation six months after giving birth. It is re-emphasized that breastfeeding cannot be relied upon as a method of contraception. Since the reproductive organs of women have not returned to normal after delivery, the uterus is very soft, and women who have had a cesarean section still have a scar on the uterus, it is easy for injuries to occur during abortion: such as perforation of the uterus, rupture of the intestinal tube, hemorrhage, etc., which is very detrimental to the body, and sometimes complications occur and even endanger the life of the mother. Therefore, after giving birth, mothers should understand the contraceptive principles and contraceptive methods of different contraceptives, and choose their own best means of contraception to avoid unwanted pregnancy. It is important to know which contraceptive method to use after delivery. Effective contraceptive methods include male condom, female condom (seldom used in China), safe period method, extracorporeal spermatozoa method, etc. However, they must be adhered to and used correctly, due to the fact that it is more difficult to be adhered to for a long period of time and be applied correctly, the failure rate is higher in the general use of it (because of the uncertainty of the ovulation period), and the film, suppository, and gel belong to the less effective contraceptive methods, and it is estimated that it is not easy to be seen in the market at the moment. Intrauterine devices (IUDs), male and female sterilization, and long-acting contraceptive injections belong to the category of long-acting and highly effective contraceptive methods (less used at present), of which IUDs, subcutaneous implants, and long-acting contraceptive injections belong to the category of long-acting reversible contraceptive methods. Topical contraceptives (films, suppositories, gels) are less effective contraceptive methods. For those who do not breastfeed after childbirth, short-acting oral contraceptive pills are available; condoms are also available (both pills and condoms are distributed free of charge by the State). Six months after the cesarean section, the postoperative scar on the uterine muscle wall is basically softened, and then the intrauterine device is placed to ensure the contraceptive effect. If you are examined by a doctor and still cannot place an IUD, and feel inconvenienced by the use of oral contraceptives and condoms, you can switch to the “skin-embedded” method of contraception (commonly used before the liberalization of the two-child policy, but not often used at present). Those who are breastfeeding after giving birth should not use oral contraceptive pills for contraception. The hormones in the pills will seriously affect the quality and quantity of breast milk and jeopardize the health of the baby. The best contraceptive method for these women at this stage is to use a condom until breastfeeding stops (not less than 10 months), and then place a birth control ring or “skin implantation” contraceptive method. After a certain period of transition, the majority of Caesarean section patients who choose to take oral contraceptives or condoms will switch to the use of birth control implants. Condoms should be used throughout sexual intercourse, avoiding the use of condoms only during ejaculation. Not all is well after the IUD is placed. The IUD should be placed with a copper-containing birth control device, fixed type and other contraceptives that are more stable and have a more certain contraceptive effect. Within six months of placing the IUD, ultrasound check the ring at 1 month, 3 months and 6 months. If there is dislodgement or conception with the device, it should be changed to other quality birth control devices. Although IUD products are constantly being updated, they all have their advantages and disadvantages. As long as the IUD placed is really suitable for you and the effect is reliable without side effects, you should continue to use it and not change it blindly. Usually, IUDs can be left in place for 5 to 15 years.