<prompt> Height of a newborn doubles at:September 2005, March 20101 year2 year3 year4 year  <response>: Ans. D: 4 yearIn general, length in normal term infants increases about 30 by 5 months and 50 by 12 months; infants grow 25 cm during the 1st yr; and height at 4 yr is about double bih length. 