1. Health
You can opt-out at any time. Please refer to our privacy policy for contact information.

Superfecundation

By

Updated January 02, 2007

Definition: Occurs when two eggs (ova) from the same cycle are fertilized by sperm in separate acts of sexual intercourse. When the sperm is from different sexual partners, the appropriate term is heteropaternal superfecundation, and describes twins who have the same mother, but two different fathers.

©2014 About.com. All rights reserved.