Sex abstinence programmes do not stop risky sexual behaviour or help in the prevention of unwanted pregnancy, a research team has concluded.
The Oxford University team reviewed 13 US trials involving over 15,000 people aged 10 to 21.
They found abstinence programmes had no negative or positive impact on the rates of sex infections or unprotected sex, the British Medical Journal said.
Researchers found none of the abstinence-only programmes had an impact on the age at which individuals lost their virginity, whether they had unprotected sex, the number of sexual partners, the rates of sexually transmitted diseases or the number of pregnancies.
"Young people need to know that they can say no to sex, just as they need to know how to protect themselves from pregnancy or sexually transmitted infections if they decide that a sexual relationship is right for them.
abstinence-only programmes don't work because they provide no safety net for those young people who do have a sexual relationship