Pregnant Woman
noun, の adjective
A pregnant wife is a pregnant woman.
妊婦 is a relatively formal term used to refer to a woman who is pregnant. In casual situations, it's common to add さん and say 妊婦さん to make it sound friendlier and more approachable.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own — just watch out for ふ turning into ぷ due to rendaku here.
妊婦さんのためのカウンセラーという、臨時の仕事が見つかりました。
I got a temporary job as a counselor for pregnant women.