egg freezing

Each twin had an ovary removed and frozen in 2009, when they were in their 30s, in hopes of buying more time to get pregnant and have babies. But will the thawed, reimplanted ovaries work?

The procedure is rapidly going mainstream, but it's so new that it's impossible to know if these women will exercise their option to have a child. Also, live birth rates from frozen eggs remain low.

It's hard to predict how quickly a woman's fertility will decline and if she'll be a good candidate for egg freezing. But doctors try to figure that out with something called an ovarian reserve test.