superfetation
Noun
Meaning
The formation of a fetus at the result of an impregnation occurring after another impregnation but before the birth of the offspring produced by it. This is possible only when there is a double uterus, or where menstruation persists up to the time of the second impregnation.
Source: Webster's dictionarySynonyms
increase
joining
conception
accession
annexation
junction
attachment
insertion
reinforcement
accompaniment
uniting
fertilization
superposition
adjunct
supplementation
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Antonyms
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Related terms
Examples
Superfetation can compensate for this loss by keeping embryos at various stages and sizes during development.
Superfetation is claimed to be common in some species of animals, but is extremely rare in humans.