The man pays child support for the baby.
The woman goes through 9 months of pregnancy with the possibility of suffering from morning sickness, stretch marks, and finally, puerperal fever. (There's also the possibility of death in more extreme cases.)
Seems to me that the "child support" the woman pays is arguably equally taxing, if you ask me.
Let's consider not just what happens DURING pregnancy, but AFTER pregnancy if the woman chooses to give birth.
Morning sickness is not in the morning. It was 24/7 for me for 4 months and I was camped out by the toilet.
Stretch marks in all the wrong places. My belly button looks really weird, too, that can only spring back to pre-baby status by cosmetic surgery.
I'm 4'11". Both my babies were over 8 pounds. My reproductive system has it's battle scars in order to have gestated and birthed them.
The birth of my first child was 15 hours of back labor where my son was flipped around facing the opposite direction. Besides breech position, back labor is considered a risk to both mother and child AND it's more painful than typical labor and delivery.
It took me 3 hours to push my son out. Let me rephrase....I'm 4'11". He was 8 pounds, 8 ounces.
Finally, I was under close supervision after I gave birth because I wound up losing too much blood. Had I not been with a qualified hospital staff, I might have met my demise that day.
I breastfed my kids until they weaned on their own. They are delightfully healthy as a result, with immune systems as strong as steel - they never get sick, seriously, NEVER - but the cost was my being there for them 24/7 for years ready to feed them ideal nutrition.
Finally, sleep deprivation is nothing to be laughed about when you consider that exhausted mothers are driving cars with their babies strapped in the back seat. I used to take mini-naps in the car when we'd be stopped in traffic or at a lengthy red light. And that was the case for me for years.
So......In spite of the legality of the ability for a father to relinquish his parental rights and duties, and I recognize that, I have no sympathy for anyone, man or woman, who thinks paying child support is unfair.