Sir, my wife going through very serious problem she is pregnant and unborn child of 5 month today I go for sonography then report say that unborn child mind is not developed they saw water inside mind no growth of brain so please tell me what to do?

This is going to be a very difficult decision for both of you, and we strangers online cannot advise you on medical situation, nor tell you what you should do. Five months is a developed baby, and aborting would be traumatic for all of you. I do hope that your wife's doctor will take a few minutes to talk in detail about the future of the child. The condition of water on the brain is called hydrocephalus, and you can do research on the subject to be informed when you see the doctor. There may be more to what is going on, such as microcephaly (smaller than average size head), which might mean that the hydrocephalus was the result of infection or injury.

My wife is pregnant and she is going through 5 month our dr giving us shocking news Hydrocephalus to our baby .so what we do what is the treatment . Please help me god some one can insist us.

I'm so sorry to hear that. The only thing you can do is follow your doctor's advice carefully.

I don't believe there is anything that can be done at this point in time. You will have to wait until the baby is born and then they will take the proper measures depending on the severity of the hydrocephalus.

Treatment can vary too much to go into here. You really do need to spend more time with the doctor, busy though he or she may be. A typical treatment for the water on the brain is a shunt, a tube, that drains fluid into the abdomen. There is no treatment for the small head. There may be mental retardation. The child may live, or may not.
Some reasons for the small head:
Exposure to hazardous chemicals/substances.
Exposure to radiation.
Lack of proper vitamins and nutrients in the diet.
Infection.
Prescription or illegal drug and alcohol consumption.
Maternal diabetes.
Genetic trait.