How soon is Mirena effective?

Blue789

Planned Parenthood says: "The Mirena IUD is effective immediately if inserted within seven days after the start of your period. If you have Mirena inserted at any other time during your menstrual cycle, use another method of birth control like a condom, female condom, or spermicide if you have vaginal intercourse during the first week after insertion. Protection will begin after seven days."

My Midwife said immediately, as it can be used for emergency contraception, but then also suggested using back up for a month.

WTF. Does anyone have an answer?