Education and contraception prevent pregnancies.
Hiding your head in the sand and pretending kids don't have sex does not.
http://education.guardian.co.uk/sexeducation/story/0,,1866111,00.html>>>snip
Teenage girls could be offered the morning after pill at schools in England under government plans to cut the increasing rate of teenage pregnancies, it emerged today.
School nurses could be allowed to arrange abortions for pupils and the government will encourage boys to use condoms by making them more freely available through schools.
>>>Snip
Mr Blair said: "We will focus efforts on teenage pregnancy on those areas where rates are rising against the overall downward trend, with improved social and relationships education.
"We will begin an expanded media campaign and offer better access to contraceptives, where appropriate."