Some peahens start laying fertile eggs after their first birthday. Peacocks take more time to become mature than the peahens. Usually it takes about 3 years to gain maturity of a peacock. After three years their tail also matures.
Patients with disorders such as Parkinson's disease, Alzheimer's disease or multiple sclerosis may use a neurologist as their principal care physician. In a consulting role, a neurologist will diagnose and treat a neurological disorder and then advise the primary care physician managing the patient's overall health.
Depending on the type and scope of problems a child faces, the neuropsychologist can prescribe medications, schedule psychotherapy sessions, or suggest different home and school arrangements. Some neuropsychologists offer counseling services themselves, but most choose to refer patients to other professionals.