When can an IUD be inserted?

An IUD can be inserted at any time during a woman's cycle if the clinician can be reasonably certain that the woman is not pregnant. It may be easier to insert during a period, but that isn't strictly necessary. It may be inserted at the time of a first trimester abortion, but there's a higher risk of expulsion if inserted after a later pregnancy ends, so it's typically 4-6 weeks until insertion after a delivery.

Limitations based on age or the number of children are no longer the standard of care. See ACOG guidelines for the latest information on choosing an appropriate IUD candidate.