06/12/2025
🧬 What Is Heteropaternal Superfecundation?
Heteropaternal superfecundation occurs when a woman releases two eggs during the same menstrual cycle, and each egg is fertilized by s***m from two different men. This can happen if she has sexual in*******se with more than one partner within a short time frame—typically within 3 to 5 days, while both eggs are still viable.
👶 How Can Twins Have Different Fathers?
- Fraternal twins are formed when two separate eggs are fertilized.
- If each egg is fertilized by s***m from a different man, the resulting twins will share the same mother but have different biological fathers.
- This makes them half-siblings, genetically speaking, even though they were born at the same time.
🧪 How Is It Diagnosed?
- It’s usually discovered through paternity testing, often when one or both fathers question biological ties.
- DNA tests will show that the twins do not share the same paternal DNA, confirming the phenomenon.
📊 How Rare Is It?
- Only about 20 confirmed cases have been documented worldwide.
- It’s more likely to occur in populations where paternity testing is common, but still remains extremely rare.
🩺 Medical Perspective
As a doctor, I can emphasize:
- This is a natural biological event, not a disorder
