Shocked doctors discovered a woman had inserted a metal spring into her vagina thinking it would act like a coil to stop getting pregnant.
The unnamed woman from China is already a mum-of-three and had attempted to prevent a fourth pregnancy using the bizarre DIY method, according to gynaecologist Fu Junhong.
It is suspected that she mistakenly believed any spring would act like an Intrauterine device (IUD), commonly known as a coil because the copper wire is coiled around the plastic.
It needs to be inserted by a doctor or a nurse and the copper is 99 per cent effective in preventing pregnancy.
But it is not the same thing as an ordinary metal spring, and not surprisingly the woman's DIY method did not stop her getting pregnant for a fourth time.