My friend is diabetics patient before marriage. After 24 months his wife is now pregnant.?

In this case the child is yet to born, will have same problame of suger right from birth or letter stage ?

Most likely develope at a later stage. My family has a history of being diabetics, though I didn't get it my sister did and they found out she was diabetic when she was five. Just because a mother or father is diabetic doesnt mean that the child will get it. It just depends if it gets coded in the child genes. There is a higher chance but also a chance that the child wont become diabetic as well.