15/08/2026
Heteropaternal superfecundation is a rare situation where twins from the same pregnancy have different biological fathers.
It happens when:
1. A woman releases two eggs during the same ovulation period.
2. She has in*******se with two different men within a short fertile window.
3. Each egg is fertilized by s***m from a different man.
4. The result is fraternal (dizygotic) twins with different fathers.
For example, Twin A could be biologically fathered by Man 1, while Twin B is biologically fathered by Man 2.
It cannot occur with identical (monozygotic) twins, because identical twins originate from one fertilized egg that later splits.