When women have more autonomy over their reproductive life, when they are able to CHOOSE when to become pregnant, there is far less demand for abortion. It's THAT BLOODY SIMPLE. Sure, there are abortions due to medical need (which even some Christians in America and other benighted places in this world would prefer to oppose), but no civilized society would deny that contingency.
I make no reservations in this view. I firmly believe that our society, in seeking to decrease female reproductive autonomy both legally and socially, is moving further and further away from the realm of "civilized." It must stop, this insistence that women not be allowed the freedom to determine when they are READY to bear a child, and the freedom to terminate the pregnancy if they find themselves pregnant when they are not.