There’s an obvious difference between the two: having a baby is not the same as giving away an organ.
Humans have a finite number of organs which they need to live. You are selling a finite resource and doing so has concrete drawbacks for the seller.
Having a baby does not give up anything. It is a win-win. Surrogates in the US are asked if they are done personally having children. The agency won’t let someone be a surrogate (usually) unless they affirm they are done having children of their own.
As an aside: a highly regulated market for organs would probably be a net positive for society. It would increase the total supply of organs and decrease demand for black market organ harvesting. It would almost certainly save many lives every year.
Humans have a finite number of organs which they need to live. You are selling a finite resource and doing so has concrete drawbacks for the seller.
Having a baby does not give up anything. It is a win-win. Surrogates in the US are asked if they are done personally having children. The agency won’t let someone be a surrogate (usually) unless they affirm they are done having children of their own.
As an aside: a highly regulated market for organs would probably be a net positive for society. It would increase the total supply of organs and decrease demand for black market organ harvesting. It would almost certainly save many lives every year.