Experts have advised women to take care when choosing their method of contraception after a survey found that many spend less than five minutes making up their mind.
Figures published by the Family Planning Association (FPA) show that almost one in three women between the ages of 18 and 49 spend five minutes or less selecting their contraceptive of choice.
This is despite the fact that almost half of these women have had a pregnancy scare.
FPA chief executive Julie Bentley said that the emotional and financial costs of an unplanned pregnancy can be "extremely high".
"Women lead busy lives full of demanding commitments and often end up prioritising other people's needs above their own. But contraception is a massively important issue," she observed.
"We think women should be putting themselves first and spending time to make sure they've got the right method for them from the wide choice available."
Women in Britain have the option of 15 methods of contraception, yet many simply opt for the pill or condoms.
Although the pill is very reliable if taken correctly, many women may find that long-lasting contraceptives - such as progestogen injections or implants - are more convenient as they last for much longer.