> we have evolved to produce offspring sooner and faster in response to harsh conditions. One could also understand the article the other way around: We have e

> we have evolved to produce offspring sooner and faster in response to harsh conditions. One could also understand the article the other way around: We have evolved to reproduce in response to natural conditions, and one result is women being able to get pregnant at about 15. Now, why should something like this happen if the natural 'optimum' would be rather 20 or 25? Read this way, the fact that needs an explanation is women getting pregnant rather late.