When will I know if my 32 week premature baby boy will make it?

No warranty children. Unfortunately wether your child is full term or preterm, bad things can still happen. At 32wks mortality is about double that of a full term infant, which is to say quiet rare, but it is best to discuss the specifics of your case with your doctors as these statistics may not be applicable if your child has other problems including small size for age or chromosomal issues.