tortoise
Outside? 
I know what you are driving at, and I can see that at first glance there are conradictions in my thinking, but for me it's about laying down some strong disincentives, (that all senior school age children could be made aware of as part of PSHE or whatever) rather than the current system which is all about enabling them to think that having a baby under-age is a perfectly reasonable thing to do.
They need to know that a baby is much more than a temporary glitch. And in spite of the money thrown at trying to keep teen mums in education, the outcome for most is still very poor indeed. It's a well-meant gesture, but ultimately a waste of public money.
And it gives the girls a great cop-out when people say 'you can't do this - what about your education/your future?' They'll just say 'I'll go back to it later'.
Knowing they are entitled to go back to it, with paid childcare and maintenence grants and the like, is an incentive to go ahead with the baby. The harsh reality is that very few do actually go back - and stick at it, and come out the other side with the same level of qualifications as their peers. They just tell themselves they will. And we are accessories to that lie.
Far better to spend the money on schemes to keep them away from motherhood until they are over 18.