I don't think 4 months is uncommon though it is often recommended to start at 6 months. It also depends on whether you (and your doctor) think your baby is getting enough from breastmilk and/or formula. My son started at 5 months.
I don't think 4 months is uncommon though it is often recommended to start at 6 months. It also depends on whether you (and your doctor) think your baby is getting enough from breastmilk and/or formula. My son started at 5 months.