Hi guys, I can not reply one by one. I just mention something.
We can do the medical exam for new born baby before the case officer contact with us, or after they ask us to do. Both are ok.
I come from China but I am away from Australia for more than one year, so they ask me to prove the ongoing relationship even though we have got marriage cerificate for about 2 years.
the other thing they ask for is my baby's medical exam.
thanks for everyone who gave me some advice and hope i can help someone.