meri beti ka birth weight 4.5 kg tha wo 37 week mai hue the n ab kya wo 8 month ki hai n uska weight 8.3 kg hai kya uska weight sahi hai ya wo underweight hai according to birth weight ???

A. Hello mom babies apna weight double karte hai about 4 to 6 months tak aur fir triple karte hai one year tak .. tho aap calculate kare , preterm babies ka weight gain comparatively slow hota hai to full term babies