foetal movement vs fetal movement

foetal movement and fetal movement both are nouns.

Word	Noun	Adjective	Verb	Adverb
foetal movement	Yes	No	No	No
fetal movement	Yes	No	No	No

As nouns, foetal movement and fetal movement are synonyms defined as:

foetal movement and fetal movement: motion of a fetus within the uterus (usually detected by the 16th week of pregnancy)

foetal movement (noun)	fetal movement (noun)
motion of a fetus within the uterus (usually detected by the 16th week of pregnancy)	motion of a fetus within the uterus (usually detected by the 16th week of pregnancy)