A study of 707 babies using postal questionnaires, weaning diaries, and routinely collected weights reports that babies weaned before 3 months, compared to after 4 months, had an increased risk of diarrhoea.
Wright CM, Parkinson KN and Drewett RF (2004). Why are babies weaned early? Data from a prospective population based cohort study. Archives of Disease in Childhood 89: 813-816.
