Along 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
Fans and foes of Obamacare jockeyed for position outside the Supreme Court Wednesday. Inside, the justices weighed arguments in the case of King v. Burwell, which challenges a key part of the federal health law.
Supporters of the Affordable Care Act gather in front of the U.S Supreme Court during a rally Wednesday. The court heard arguments in the case and is expected to announce its decision in June.
Alex Wong/Getty Images
Senate Majority Leader Mitch McConnell (from left), Senate Minority Leader Harry Reid and House Speaker John Boehner have reasons to watch the Supreme Court case closely — and to worry about its outcome.
Drew Angerer/Getty Images
Three varieties of Kenyan purple tea from What-Cha: silver needle purple varietal white tea (from left), hand-rolled purple varietal oolong, steamed purple varietal green tea-style tea.
Jeff Koehler for NPR