Please don't pretend that mothers and mothers-to-be don't have any agency in the events that lead up to birth. Marriage has little to do with reproduction. It's a legal construct, not a natural one. The law should not be obligated to compensate for the edicts of biology and certainly not at the expense of another's economic freedom. A woman chooses to incubate, and raise children. Where coercion or duress are not involved, she should bear responsibility for what are all the consequences of her choices with regards to her body.