Under normal circumstances, as long as the woman is not pregnant, the birth control ring can be placed at any time. However, in some cases, it is troublesome to put the ring, and it is prone to complications and side effects, so it is better to choose a more appropriate time to put the ring.

　 The routine time to place the birth control ring is 3-7 days after the menstruation is clean.

       As a result, the endometrium is relatively thin at this time, and the endometrium damage caused by the ring placement can be quickly recovered, so there is less bleeding;

       Secondly, at this time, the ovulation period is not yet reached, so it is generally not pregnant. If you put the birth control ring after this period of time, you need to be sure to put the ring before you are pregnant.

　　 The birth control ring can be put on after a normal menstruation after spontaneous abortion or mid-term labor induction. The ring release time is usually 3 to 7 days after menstruation is clean.

　　Women who have an abortion can put on the birth control ring immediately after the abortion. In this way, a single operation can achieve the two purposes of abortion and contraception, reducing the pain caused by one-time ring placement, and the cervix is loose during an artificial abortion, and the ring is easy to place. However, if the uterus has poor contractions, excessive bleeding or infection after an artificial abortion, do not put the ring temporarily.

　　 After 3 months or 3 months after delivery, some women can put birth control rings on their ovaries. At this time, the uterus has recovered, the size of the uterine cavity has returned to normal, and most people have not resumed ovulation, and the chance of conception is low. The ovulation function has been restored, and pregnancy can be achieved even if the menstruation is not in the future.

　　 At present, some medical units put birth control rings around 42 days postpartum and have achieved good results. Because the uterus has returned to its normal size at this time, the model of the ring is moderate, and there is no need to change the model of the ring after weaning, thus reducing the pain of one ring change; at this time, the uterine orifice is not tight, the operation of the ring is easy, and the pain is small. The uterus has a certain degree of hardness, unlike the breast-feeding uterus, which is soft and small, so it is not prone to perforation during the operation. At this time, the parturient is still in the maternity leave and can get enough rest, thereby reducing the rate of shedding of the birth control ring.

　　 Caesarean section operation can also put on the birth control ring, or the cesarean section for more than half a year, the birth control ring can be put on after the wound on the uterine wall is firm. Other contraceptive measures should be taken before placing the birth control ring.