Twins with different dads

A Texas woman is found to have a twins but of different dads. She gave birth to twins of different fathers nearly a year ago. Both of them have similar appetites. They like to play with their older brothers. They like to play with each other. How did it happen? Every month a woman's ovary releases one egg that can be fertilized by one sperm. But in this case, a pair of eggs emerged.Sperm, meanwhile, can remain alive and well and viable for up to five days in the reproductive tract. Thus a woman can have sex with different men within those five days and the sperm “just kind of hang out there waiting for the egg to be released,” Dr. Hilda Hutcherson, Clinical Professor of Obstetrics and Gynecology at Columbia University.