I nsertion Proper IUD insertion reduces the risks of pregnancy and of all major side effects expulsion, bleeding and pain, perforation, and infection. IUDs can be inserted safely at any time during the menstrual cycle as long as it is reasonably certain that the woman is not pregnant and there are no signs of genital infection. Cervical infections should be treated before the insertion.
Insertion immediately postpartum also is safe and convenient.
Higher expulsion rates are a drawback, however.