The photo, posted by mum Lucy Hellein from Alabama, has now been shared over 72,000 times on Facebook.
She gave birth to her third child, Dexter Tyler, by caesarean section and the surgeon removed her Mirena coil during the operation.
The coil is another name for an intrauterine device, or IUD.
Women shouldn’t be worried though, because NHS figures state that if implanted correctly the coil is 99 per cent effective, and fewer than one in 100 women who use an IUD will get pregnant in one year. IUDs with less copper will be less effective.
Hellein captioned her image with “Mirena fail!” but she’d previously had no problems with the coil.