A 2 year old boy who is developing normally but is slow to walk should have what lab drawn?
a) Creatine kinase (CK) levels to assess for muscle damage or disorders.
b) Thyroid function tests to evaluate for hypothyroidism, which can affect muscle development and motor skills.
c) Complete blood count (CBC) to rule out anemia, which can sometimes present with delayed motor development.
d) Serum lead levels to screen for lead poisoning, which can lead to developmental delays including motor skills.