which is better?

I would say newborn up to 3 months, cus they can lay still and minimal movement. But i kept on postponing it for my boy and now he is alr 6 months. So now too late.. i will just have to wait till he is much older. Nevertheless, its totally up to u and ur family, no right or wrong, its personal preference.

A bit older would be my choice. Dun want newborn to be in pain as they can cry all day, and its gonna be hectic for u. Futhermore they can't express their feelings as they can't talk. Up to individuals actually, whatever is best for u.