A woman does not have to become pregnant unless she believes the advantages outweigh the disadvantages.
Yes, I also believe not every woman weighs everything in a way as rational as you do.
I'm seeing the side of the employer here. You can see unequal wages even today where these things are supposed to be more "regulated" in that concern.That premise is completely false from the start. Women don't raise children alone and haven't done so for centuries. Family is the foundation of society. It doesn't cost her more than her partner, who's equally as liable for family expenses as her (usually more).
As I said in the OP, women feel more connected and responsible for their children, and it's more often the men who run away, so it's the woman who carries more risk. So you can either disagree with this observation, or you can blame women for their motherly feelings being in the way of their career.
Taking care of the disadvantaged is a whole different story. We are talking about socialising child care here, or not, which is not an emergency/exceptional issue.
I didn't mean "disabled" with "disadvantaged" if you misunderstood here, and generally, I'm also looking for solutions here which are not "socialist", but will still convince even left-leaning folks. I'm playing their advocate here.
Humans, if anything, have too much natural drive to procreate until they deplete their available resources. They don't need any incentives, quite to the contrary.
Still, more risk for women in this game.