midwifery vs foetology

midwifery and foetology both are nouns.

Word	Noun	Adjective	Verb	Adverb
midwifery	Yes	No	No	No
foetology	Yes	No	No	No

As nouns, foetology is a hyponym of midwifery; that is, foetology is a word with a more specific, narrower meaning than midwifery:

midwifery: the branch of medicine dealing with childbirth and care of the mother
foetology: the branch of medicine concerned with the fetus in the uterus

Other hyponyms of midwifery include fetology, perinatology.

midwifery (noun)	foetology (noun)
assisting women at childbirth	the branch of medicine concerned with the fetus in the uterus
the branch of medicine dealing with childbirth and care of the mother