How soon does an IUD start working?

Three days after getting the Skyla IUD I had sex with my boyfriend and he came inside me. I got the IUD while I was on my period, but now I'm scared that I'm pregnant. 


  • If you were on your period when the Skyla went in, that is The right time to insert it-- and while I do always recommend condoms for the protection they provide against STDs, the pregnancy protection with the Skyla is already there once it goes in. It works locally, thinning the uterine lining and making it difficult for sperm to get into and to live inside the uterus. It does not affect your ovulation-- so it should already be working to provide you contraception.
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