Conception is 10% down, let's say 100 girls got pregnant as a teen in 2008 (if only that were true figure!) it means that 90 girls got pregnant in 2009.
Of those 90 girls, compared to 2008 (or whatever, not sure what they're using as point of reference) actual births were down 20%. So for arguments sake, in 2008 50% of girls went on to have actual births, in 2009 30% of girls went on to have actual births.
That is my basic explanation/interpretation of the statistics, obviously with all the terms made up!
Just out of interest, who IS treating contraception and abortion of the same thing? I can't see anyone doing so on this thread or indeed in the public eye. Contraception is rammed down teenagers throats, it's done in school, tv adverts, magazines and hopefully at home. Unfortunately people don't always make responsible choices, teenagers and adults alike.
The side issue of Chlamydia is one that is also being positively tackled, free testing kits being sent out to all under 25 year olds, you just have to pee in a cup! They couldn't make it any easier. People WILL have unprotected sex, if you have a way to make sure every person who is sexually active always uses contraception then I'm sure the government and NHS would be delighted but let's face it, it's not going to happen.