A mother in Dallas, Texas, recently gave birth to twins. That’s not really news; the special part is each twin has a different father. This occurrence is extremely rare, but possible. If a woman releases multiple eggs during ovulation, and has more than one sex partner during that time, then two eggs can be fertilized separately by different men. This is called heteropaternal superfecundation, and only a handful of cases are documented in the world. continue reading...
