Women may want to consider using a new contraceptive gel instead of a pill, if the substance passes further medical tests.
The latest round of trials found of the 18 women in their 20s and 30s who were administered Nesterone over a seven-month period, none fell pregnant.
Similar to the pill, the gel contains oestrogen and progesterone.
It is administered by rubbing a small amount in to the abdomen, thighs, arms or shoulders on a daily basis, the BBC reported.
Natika Halil, director of information at the Family Planning Association, told the news source: "Any contraceptive system that increases the choice of methods available to women and helps to prevent unwanted pregnancies is welcome.
"Our research shows that there are approximately two million women using a contraceptive method that they are unhappy with, so they will benefit from improved choices and options."
Independent advice on private healthcare