Respected Doctors.. My baby girl is 86 days..(approx 3 months)Her birth weight 2 kg 950 g..and length 50 cm and head circumference was 34 cm..We go for vaccination at7th week 2days(  51 days) and  doctor check her HC is 36 cm ,we go for second vaccination at 11 weeks(82 days) then her HC 38 cm. Today 86 days and we messure her HC is 38.5cm.. Is it normal in 3 months HC is only increased 4.5cm..????I  read in google at first 3 months HC increased 2 cm per months.. Now my baby's weight is 5kg 250g..her HC 38.5cm..is it normal?is there any problem why my babys head circumference only increased 2 cm in aprox 2 months..???my babys all mile stones are okay she is active..Is my baby has microcephaly??