What are they going to do, forcibly inseminate women?
Women IMO just don't want to be pregnant any more- it's 6 months of problems, agony to bring the child into the world and costs vast amounts of money to raise.
Careers and a better lifestyle IMO have a lot to do with it.
The old way where men would earn the money and women stay at home to raise a brood are gone forever. Time to accept it, and come up with solutions to deal with that situation, not moan that women no longer want to have as many or even any children.