with child vs expectant

with child and expectant both are adjectives.

Word	Noun	Adjective	Verb	Adverb
with child	No	Yes	No	No
expectant	No	Yes	No	No

As adjectives, with child and expectant are synonyms defined as:

Other synonyms of with child include big, enceinte, gravid, great, heavy, large.

with child (adjective)	expectant (adjective)
in an advanced stage of pregnancy	marked by eager anticipation
	in an advanced stage of pregnancy