The moral analog between pregnancy and organ donation is provocative, but the biological analog is weak.

Pregnancy and reproduction do not require technological intervention. It’s something our ancestors have been doing since before our ancestors were human.

Although pregnancy is risky — even death-defying for the Mother — it is biologically different from organ donation because it is never possible to donate a kidney, grow another, and then grow 12 more.

Women are equipped by their reproductive biology to give birth as part of their healthy bodily functioning, and they are capable of multiple births within their viable reproductive lifetimes.

Kidney donation carries qualitatively different risks, consequences, and capabilities that change the moral equation.