superfetation

English Thesaurus

1. 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)

hypernym	:	fecundation, fertilisation, fertilization, impregnation,
definition	:	creation by the physical union of male and female gametes; of sperm and ova in an animal or pollen and ovule in a plant (noun.event)

derivation	:	superfetate,
definition	:	conceive when a fetus is already present in the uterus (verb.body)

derivation	:	superfetate,
definition	:	conceive when a fetus is already present in the uterus (verb.body)