giving birth vs birthing

giving birth and birthing both are nouns.

Word	Noun	Adjective	Verb	Adverb
giving birth	Yes	No	No	No
birthing	Yes	No	No	No

As nouns, giving birth and birthing are synonyms defined as:

Other synonyms of giving birth include birth, parturition.

giving birth (noun)	birthing (noun)
the process of giving birth	the process of giving birth