That's what happens when party doesn't have an actual policy stance and min-maxes their pooling numbers based on target audience instead.
Another more cynical take is "childbirths" is just a code for racism and "pro-life" a code for religious types.
The minute they even think that minorities are help by pro child policies they will be back to the “welfare queen” dog whistles that Reagan did.
But to be fair, a few of the religious non MAGA conservatives did understand that the best way to reduce abortions were to support new mothers and children. But now that Roe v Wade has been overturned, they don’t seem to care about it anymore.