The prevalence of low birth weight ( < 2500 g ) was 12.7 % , 13.5 % , and 12.1 % ( P = 0.856 ) , respectively ; newborn stunting ( length-for-age z score < -2 ) was 19.2 % , 14.0 % , and 14.9 % ( P = 0.130 ) , respectively ; and newborn small head circumference ( head circumference-for-age z score < -2 ) was 5.8 % , 3.0 % , and 3.1 % ( P = 0.099 ) , respectively .