 As a result, many mothers had low milk supply (as breast milk is a supply-demand phenomenon), and therefore their babies “failed to thrive.” Not surprisingly, the amount of formula available skyrocketed, as did the availability of strained or mashed “baby foods.” By the 1930s, a variety of Gerber purees were available for purchase.Current breast feeding recommendations by the American Academy of Pediatrics are that infants should be breast fed for the first 6 months, then be gradually introduced to solid food between the age of 6 months and 1 year.A more recent study at the University of Nottingham by Ellen Townsend and Nicola J. Pitchford suggests that baby-led weaning may lead to less obesity in childhood.