“The topmost photo at right is of an ovary of the species Poeciliopsis presidionis, which has superfetation and extensive maternal provisioning.”

“When does are bred on multiple heat cycles, it may appear that superfetation has occurred due to fetal sizes and maturity differences.”

“Superfetation is more rare than superfecundation. Only a couple of cases have been described. These superfetation cases were both homopateral.”