日本語
neta mama
to be lying on the bed ; remain lying
ねたままだと、べんが でにくいですね。
It's difficult to defecate while you remain lying on the bed.
うつむけ
to lie on one's stomach
からだの むき
direction of the body
あおむき
on one's back ; supine position
うつぶせに なる
そくがい
lateral position