superfetate
/ˌsupərˈfiteɪt/
verb
- To conceive a second fetus while already pregnant, resulting in two fetuses of different ages in the uterus.
- It is extremely rare for a human to superfetate, but it has been documented in some mammals.
- Some animals, like kangaroos, can superfetate as part of their reproductive strategy.
- The doctor explained that a woman cannot normally superfetate because hormonal changes prevent further ovulation.