Enlarge Image Who's your mommy? These adult mice grew from oocytes, or immature eggs, derived in vitro from induced pluripotent stem cells. Credit: Mitinori Saitou and Katsuhiko Hayashi Want baby mice? Grab a petri dish. After producing normal mouse pups last year using sperm derived from stem cells, a Kyoto University team of researchers has now accomplished the same feat using eggs created the same way. The study may eventually lead to new ways of helping infertile couples conceive. "This is a significant achievement that I believe will have a sustained and long-lasting impact on the field of reproductive...