New research suggests that while babies conceived via IVF experience changes to their genes, these differences disappear by adulthood.
Before the advent of genetic testing, definitions of paternity were primarily social and legal. Science has destabilized these older definitions, but it has not replaced them.
We don't know anything about the health of the baby girls who are reported to have been born. But it's clear scientists around the world are shocked.
For women and men not ready to have children, there are new ways to preserve fertility. And experimental techniques offer hope for sick children whose treatments jeopardize future childbearing.