The baby's brain continues to develop and only achieves its mature form a few months after deliver. Should the pregnancy encounter any problem or if the baby develops an abnormality of the brain, the changes may only be seen later in the pregnancy.

Neurosonogram is the study of the structure and function of the baby's brain.

It is an ultrasound scan examination.

This examination is usually performed between the 28th and the 32nd weeks of the pregnancy or whenever a problem is detected.

Abdominal or transvaginal scanning may be necessary to complete the examination depending on the position of the baby's head.

During the examination, all structural components of the maturing brain is examined. Its functional aspect i.e external and internal movements of limbs and various organs are studies.