Can twins have two different dads?

That is, each egg can be fertilized by a different father. However, if you know twins who look nothing alike, don't assume that they have separate fathers. Like any siblings, twins who have the same father can look completely different from each other. They may even appear to be of different races. read more

Things can get complicated when you start dealing with triplets, quintuplets, and even bigger single-pregnancy broods. For instance, a mother having triplets could have identical twins from the same egg and a third child from an entirely different egg and sperm. read more

With bi-paternal twins, she said, each egg is fertilized by a different man's sperm. Hutcherson said eggs can live up to 24 hours in a woman's reproductive system. Sperm, on the other hand, can live up to five days in the woman's body, she said. read more