The survey, commissioned by Bayer Healthcare Pharmaceuticals and endorsed by 11 international non-governmental organizations, questioned more than 6,000 young people from 26 countries including Chile, Poland and China, on their attitudes toward sex and contraception.
The level of unplanned pregnancies among young people is a major global issue, campaigners say, and the rise in unprotected sex in several counties has sparked concern about the quality of sex education available to youngsters.
Many respondents also said that they felt too embarrassed to ask a healthcare professional for contraception.
More than a third of respondents in Egypt believe bathing or showering after sex will prevent pregnancy, and more than a quarter of those in Thailand and India believe that having intercourse during menstruation is an effective form of contraception.
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