Superimpregnation and Superfetation

Superfetation and superimpregnation are semantically related. In some cases you can replace term "Superfetation" with "Superimpregnation", this words are similar.

Superfetation noun - Fertilization of a second ovum after a pregnancy has begun; results in two fetuses of different ages in the uterus at the same time.

Superimpregnation and superfetation are semantically related. Sometimes you can replace term "Superimpregnation" with "Superfetation", this nouns are similar.