Genetic counselling is necessary because of the following conditions if:Either of the parents has a family history of genetic disease or a previous child with a genetic disease such as heart defects, mental retardation, defect in the neural tube, short height, psychiatric disorders, cancer, etc.Either of the parents or both have an autosomal dominant disease.If the mother carrying the child is 35 or above years old.The mother suffers from conditions like depression, alcoholism, diabetes, thyroid, schizophrenia, etc.