<prompt> Most common neonatal disorder screened is:Neonatal hypothyroidismNeonatal hypehyroidismHemoglobinopathiesCongenital Dislocation of Hip  <response>: Most common neonatal disorder to be screened is Neonatal hypothyroidism NNH Blood sample is collected from Cords Blood fromheel prick after 24hrs of bih Test- measurement of T4 or TSH both simultaneously. As a single method, T4 is more useful greater precision and reproducibility Congenital Hypothyroidism is one of the most common preventable cause of mental retardation. Hence, neonatal screening early supplementation of thyroid hormones can prevent this mental retardation. 