AdvertisementFertility Clinic Courts Controversy With Treatment That Recharges EggsMarch 05, 2015Rob SteinfacebookEmailAlong with sperm, the in vitro procedure adds fresh mitochondria extracted from less mature cells in the same woman's ovaries. The hope is to revitalize older eggs with these extra "batteries." But the FDA still wants proof that the technique works and is safe. (Chris Nickels for NPR)