Health and Fitness Prolonged Breastfeeding May Be Connected to Fewer Child Behaviour Problems by Gary Kopycinski on May 17, 2011 Gary Kopycinski Author More in Health and Fitness: On Hantavirus, Park Forest Officials Urge Caution May 18, 2026 Rep. Kelly Condemns FDA Approval of Flavored E-Cigarettes May 6, 2026 Park Forest Aligns With Illinois Guidance on Childhood Vaccines Amid Federal Changes January 11, 2026 UNITED KINGDOM–(ENEWSPF)–17 May 2011. Breastfeeding for four months or more is associated with fewer behavioural problems in children at age 5, an Oxford University study suggests.