The observation was made by the British Pregnancy Advisory Service (BPAS).

According to BPAS, one in four women who had abortions in 2016, were using different methods of contraception and realised late that they were pregnant.

Though no method of contraception is foolproof, some methods have a high efficiency rate.

Decoding the failure, BPAS said that unplanned pregnancies can occur if one is not careful enough while using the contraceptive.

Another way it can fail is if the method implementation isn't right.

Ann Furedi, chief executive of BPAS, said, "Our data shows that women cannot control their fertility through contraception alone, even when they are using some of the most effective methods."

Though England, Scotland and Wales allows unconditional abortion, Northern Ireland allows the procedure only if a woman's life it as risk.

Much to their relief, women from Northern Ireland are now eligible to get free abortions in England.

With the failure rate slowly creeping up, health experts believe that long acting methods can reduce the risk of unintended or unplanned pregnancy. 

images: Internet Wallpapers