A doctor says the odds are probably one in a million. Twin sisters are seeing double -- or make that quadruple -- after both delivered twin boys about an hour apart today at an Atlanta hospital. Both sets of twins were delivered by C-section. The 21-year-old sisters were six months pregnant when they found out they were both going to have twins due on the same date. One of the women, who's from Indianapolis, arrived in Georgia several weeks ago to be with her sister for the births. The two couples say twins run in the families of all four parents. They also say they didn't use fertility drugs to conceive the babies.