YOU SAID:
Once upon a time there was a baby.
INTO JAPANESE
むかしむかし、赤ちゃんがいました。
BACK INTO ENGLISH
Once upon a time, I had a baby.
INTO JAPANESE
むかしむかし、私は赤ちゃんを産んだ。
BACK INTO ENGLISH
Once upon a time, I had a baby.
That didn't even make that much sense in English.