superfetate

English Thesaurus

1. conceive when a fetus is already present in the uterus (verb.body)

hypernym	:	conceive,
definition	:	become pregnant; undergo conception (verb.body)

derivation	:	superfetation,
definition	:	fertilization of a second ovum after a pregnancy has begun; results in two fetuses of different ages in the uterus at the same time (noun.event)

derivation	:	superfetation,
definition	:	fertilization of a second ovum after a pregnancy has begun; results in two fetuses of different ages in the uterus at the same time (noun.event)