प्रफेसार देथथ्वैलरा सुबुं देहा बिगियान देथा निफ्राय साननानाययो दि, आहार एंगारनायनि गुबै बैसोआ 4 आरो 6 बैसोनि गेजेराव।
Professor Dettwyler estimates, from anthropological data, that the natural age for weaning is between 4 and 6 years.