Give men reproductive rights on a par with women. If she wants to terminate the life of an unborn child then surely a man should have the right to opt out of financial responsibility for a child he does not want, even if biologically his.
So many men are going MGTOW and boycotting marriage because women have exclusive ownership of reproductive rights.
Even a simple administrative measure like a mandatory DNA test at birth to determine the paternity of a child will incentivise men to be better fathers. It is often the case that abusive or personality disordered women will mock their spouses for not being the biological father of their children.