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Why is my 42-year-old infant not making sounds from birth?

This Premium Q&A, reviewed and published, features a real conversation between an iCliniq user and a physician.

Patient's Query

Hello doctor,

I delivered my second baby 42 days ago. She was born at 39 weeks. She has not started smiling yet. She smiles only in her sleep. Twice, when I touched her cheeks, she smiled. She is also not making “ah” or “oo” sounds yet. When do babies usually start doing these things? I am really worried about this.

Please help me.

Hello,

Welcome to icliniq.com.

I understand your concern.

As per your history, your baby is six weeks old. A spontaneous smile is present from birth, which you mentioned your baby shows during sleep. A social smile usually develops around two months of age, so there is no need to stress. This is normal for your baby.

Regarding vocalization, cooing sounds typically begin around three months of age. So your baby is normal in that aspect as well.

Please do not worry. You can check developmental milestones online for reference.

Otherwise, your baby appears to be growing normally. Babies who are born at term and have no antenatal or postnatal complications generally follow normal developmental patterns. You just need to observe the developmental milestones according to age. A variation of about a month can be normal, but not much more than that.

I hope I have answered your query.

Kindly continue exclusive breastfeeding until six months of age to help protect your baby from infections and illnesses. Continue breastfeeding along with complementary feeding up to at least one year of age or beyond.

Maintain proper temperature care for your baby.

After six months, focus on proper nutrition. I can also guide you regarding that when needed.

Most clear developmental milestones are not firmly established before two months of age, so at this stage, there is usually no cause for concern.

I hope this has helped you.

Please feel free to reach out to me again if you have further queries.

Thank you.

Medically reviewed byiCliniq medical review team

Published At April 18, 2026
Reviewed AtApril 20, 2026

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