What happens if solid foods are introduced to a boy baby after the completion of 4th and falls to 5th

A. At about 6 months, babies need the added nutrition — such as iron and zinc — that solid foods provide. It's also the right time to introduce your infant to new tastes and textures. Some babies may be ready for solids sooner than 6 months, but don't start until your baby is at least 4 months old.