Texas Woman Births Two Sets of Identical Twin Boys

Tress Montalvo of Houston gave birth to two sets of identical twins. They're all boys. That's a lot of little boys. The odds of birthing two sets of identical twins? One-in-70 million. Usually in cases of multiple births, fertility drugs are involved; that's not the case here. Besides, fertility drugs yield… » 2/20/13 10:00am 2/20/13 10:00am