ectopic gestation vs metacyesis

ectopic gestation and metacyesis both are nouns.

Word	Noun	Adjective	Verb	Adverb
ectopic gestation	Yes	No	No	No
metacyesis	Yes	No	No	No

As nouns, ectopic gestation and metacyesis are synonyms defined as:

ectopic gestation and metacyesis: pregnancy resulting from gestation elsewhere than in the uterus

Other synonyms of ectopic gestation include eccyesis, ectopic pregnancy, extrauterine gestation, extrauterine pregnancy.

ectopic gestation (noun)	metacyesis (noun)
pregnancy resulting from gestation elsewhere than in the uterus	pregnancy resulting from gestation elsewhere than in the uterus