| Heteropaternal superfecundation. | Heteropaternal superfecundation Spooky Little Girl (2011) |
| superfecundation | (n) fertilization of two or more ova released during the same menstrual cycle by sperm from separate acts of coitus (especially by different males) |
| Superfecundation | n. (Physiol.) Fertilization of two ova, at the same menstruation, by two different acts of coition. [ 1913 Webster ] |