ectopic gestation vs ectopic pregnancy

ectopic gestation and ectopic pregnancy both are nouns.

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

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

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

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

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