The decision to terminate a pregnancy should be a personal one, not one carried out for social purposes. Just look at what's happened in China.

Unrestricted procreation has always been frowned on by all societies throughout history, and for good reason. In the past, it was done by cultural pressure and regulation. That is, after all, what marriage is really about: to try to ensure that children are only born into some form of relatively stable and guaranteed family structure. In the absence of the family as an institution, we now opt for more technical methods, such as abstinence, contraception and abortion. But they are still voluntary. Using abortion, or even contraception, to ensure a social goal would demand a form of true coercion.