Average head circumference at bih is ?: (A) 35 cm, (B) 40 cm, (C) 45 cm, (D) 50 cm
Answer is A. O.P. Ghai 9th ed, page 14 Beginning at 34 cm at bih, the head circumference increases approximately 2 cm per month for first 3 months, 1 cm per month from 3-6 months and 0.5 cm per month for rhe rest of the first year of life.