#asktheexperts my 4 months baby boy on formula feeding weight 4kg!? his birth weight is 3.5 kg.. is this normal or under weight!?first 2 month he is on breast feeding.

A. Your 4-month-old baby boy weighs 4 kg, while his birth weight was 3.5 kg. Ideally, by 4 months, a baby’s weight should be around double the birth weight (approximately 7 kg for your baby). Since he has gained only 500 grams in 4 months, this indicates slow weight gain and is considered underweight for his age. Possible Reasons for Low Weight Gain: Transition from Breastfeeding to Formula – Some babies take time to adjust. Formula Intake – Ensure he is getting enough formula as per his weight and hunger cues. Feeding Frequency – He should be feeding 6-8 times a day, around 120-150 ml per feed. Digestive Issues – Any vomiting, reflux, or digestion problems? What You Can Do: ✔ Check Formula Quantity – Ensure he is getting adequate formula for his weight. ✔ Frequent Feeds – Try offering small, frequent feeds instead of large ones. ✔ Monitor Growth – Check with your pediatrician for growth tracking and nutritional support. ✔ Rule Out Medical Issues – If he is not gaining weight despite proper feeding, the doctor might check for digestive or metabolic concerns. Since weight gain is slow, it’s best to consult a pediatrician to rule out any underlying issues. Let me know if he has any feeding difficulties!