You can have intercourse whenever you want and are comfortable with it. There is no waiting period and it is effective immediately if it's inserted within seven days after the start of your period. Otherwise, you'll need to use a backup form of contraception (such as condoms) for the first seven days after you get your IUD.
The answers in online forums are for information only and are not intended to substitute for medical advice and care. Please see your personal health care provider for further evaluation of your individual case.
Debbie Miller, RN