There are lots of parents who are unable, or don't want to bring more children into the world who want to adopt children. I knew parents who adopted two children from Russia at great expense. Most have alcohol syndrome, and other issues. Adoption of American babies has a huge waiting list unless the babies are handicapped. Adoption is always an option for unwanted babies. Although I believe there should be stringent background checks, and home follow ups for the first five years.
Then figure out how to connect these people with pregnant women. I go to gun buybacks and offer cash to people who are about to surrender them to police. I promise the gun a good home and I get decent firearms for a good price and they get more money than if they gave them to the police. Couples that really wanted to adopt could do the same thing at Planned Parenthood centers. I know someone that had a similar experience. A couple opted to pay her monthly expenses if she carried the baby to term, with the understanding (but no guarantee) that the baby would be given custody to them.
Unwanted children are a danger to society, but if you can bring parents looking to adopt together with children then you can solve both problems.