A twofold pregnancy, or superfetation, is exceedingly rare—there are no statistics on how frequently it occurs—but it is technically conceivable. We're not suggesting you should be concerned about it occurring to you; rather, you can't claim it's impossible. This is why. After the infants were born, they were swiftly sent to their legal parents, but when Allen viewed a photo of them later that night, she discovered they had different skin tones. A DNA test confirmed that the babies were not twins, but rather half-brothers.