I think that actually, at least in the U.S., birth rates are down, at least among millennials and Gen "Y" (I don't know what "Gen" we're up to now). More young people are deciding to not have children, or at least put off having children until later in life. The same cannot necessarily be said for third world countries or immigrants from such places, so I'm not sure that the anti-abortion push is to provide cannon fodder.
