YOU SAID:
Mom is giving birth to the dog again.
INTO JAPANESE
ママは犬を再び出産している。
BACK INTO ENGLISH
Mama gives birth to the dog again.
INTO JAPANESE
ママは犬に再び誕生する。
BACK INTO ENGLISH
Mommy is born again in the dog.
INTO JAPANESE
ママは犬の中で再び生まれる。
BACK INTO ENGLISH
Mommy is born again in the dog.
That didn't even make that much sense in English.