Pediatrics General e7657275 A newborn baby has a head circumference of 35 ems. at bih, His optimal head circumference will be 43 ems at - A 4 months of age B 6 months of age C 8 months of age D 12 months of age High-Yield Explanation Ans. is 'b' i.e., 6 months of age o At 6 month of age head circumference is between 40.0-43.5cm.