How are you going to make sure that the woman does not go through nine months of pregnancy, perhaps dangerous, vomiting, and does not bleed or suffer pain in the birthing process, and the father will be right there to comfort her, and accept the infant, and take it away if she does not want it.
Sorry, men just don't go through pregnancy and childbirth or risk their lives in any way. At most, they spend five minutes having a feel-good time. Never is there any risk to their lives, health, or any interference with their daily lives. No blood of their's is shed.