noun which may take the genitive case particle 'no'
while pregnant; during pregnancy
Used to describe a state or action occurring during pregnancy. Often modifies nouns with の.
妊娠中の女性は、お酒を控えたほうがいい。
Women who are pregnant should avoid alcohol.
妊娠中に激しい運動をするのは
It is dangerous to do strenuous exercise during pregnancy.