STEIN: At the same time, the DNA for IVG could come from anywhere a single cell could be found. Hank Greely, a bioethicist at Stanford, raises some of the provocative possibilities.

HANK GREELY: Ninety-year-old genetic mothers, 9-year-old genetic mothers, 6-month-old fetuses that become genetic parents, people who have been dead for three years whose cells were saved to become parents.

STEIN: People could even potentially steal the DNA from celebrities from, say, a clipping of their hair to make babies.

GREELY: One law we definitely need is to make sure people can’t become genetic parents without their knowledge or consent.