Hi. Don't worry about it if your baby is gaining appropriate weight. My baby is 4 months old feeds only for 5 minutes. When baby grows they tend to feed more milk in less time. Plus they may tend to get diverted easily to noise. Try feeding ur baby in a quite environment free from any disturbance. Play a mild music during the feed. It's works wonders for my baby.

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My son is 4 month old he feed only 4 to 5 min.. some time he feed only one or two. He is on exclusive breastfeeding.i am so much worry about his growth