Of course the only problem is if there is no immigration and current birth rate trends continue western nations and Japan will decline in population. So to retain the population base, citizens here have to start making more babies. But the richer a nation gets the lower the birth rate is. Its almost a damned if you do damned if you don't scenario.
First immigration has to be overhauled and a much better screening process needs to be put in place over the non-existent one now. To increase the birth rate in the US, the tax code needs to be reworked to the point that people actually have the money to raise children. It would be nice to get back to the days where you only needed one parent to work out of the home.
But the birth rate would rise without abortion.