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.
Visiting an endocrinologist does not mean you will never see your primary care doctor again. Going to an endocrinologist when struggling with a hormonal condition gives you another set of eyes to ensure your health is as good as it can be. Remember, your goal when facing a hormonal disease diagnosis should be to take care of your condition as best as possible.