breech delivery vs breech birth

breech delivery and breech birth both are nouns.

Word	Noun	Adjective	Verb	Adverb
breech delivery	Yes	No	No	No
breech birth	Yes	No	No	No

As nouns, breech delivery and breech birth are synonyms defined as:

breech delivery and breech birth: delivery of an infant whose feet or buttocks appear first

Other synonyms of breech delivery include breech presentation.

breech delivery (noun)	breech birth (noun)
delivery of an infant whose feet or buttocks appear first	delivery of an infant whose feet or buttocks appear first