Is breast milk really the best option?
Relying purely on breastfeeding for the first six months might not be best for babies, experts in the UK have warned.
Now a new review says that breastfed babies should be weaned before they're six months old.
Scientists from University College London say children not introduced to solid food early enough could suffer from iron deficiency, or become prone to allergies. The research, however, contradicts government advice.
The BBC's Daniela Relph reports.