Unless, not having that "out", many of those pregnancies would not exist in the first place.
Just a thought
So the idea of strapping a pregnant woman and enslaving her to 9 months of carrying a child to term is appealing to you, from a socio-political standpoint?
Check this map of countries where abortion is legal/illegal, and tell me what you see:
SHE made the choice to do what it takes to get pregnant yet you want to blame the rest of us for EXPECTING her to accept the responsibility for having done so.
What you're proposing would be like someone taking out a loan at a bank then expecting the person to make the monthly payments associated with doing so.
Except the man, too, took out the loan.
Where are his payments?
The man is told what the woman does with her body is her choice and no one else's business.
When the sperm donor doesn't pay and the mother can't pay, why are the payments to support someone else's kid placed on the backs of those that didn't take out the loan? In other words, why is the responsibility of supporting the kids of a woman who says what she does with her body placed on those unassociated with the situation when she can't pay?
Sperm banks are not free, they cost around $1000. Some get a friend to donate sperm, in a cup instead.
Eggs can cost well in the $10-20,000 range
Adoptions can cost $25-50,000 after a back ground and financial check
Parents should be ready to be parents not just by accident.