title: Development of bladder control in the first year of life in children who are potty trained early.
abstract: OBJECTIVE
  To describe longitudinally the development of micturition patterns in children who are potty trained early.
  
  
  METHODS
  Healthy children in Vietnam from newborn up to 1 year were investigated every 3 months. This included mapping of the micturition pattern through the 4-h micturition observation method.
  
  
  RESULTS
  Forty-seven children participated in all five investigations. At the ages of newborn, 3, 6, 9 and 12 months, 70%, 82%, 91%, 99% and 100% of the mothers, respectively, were potty training their children. Mean lowest bladder volume (voided volume + residual urine) triggering a micturition was 18 ml at the age of 2 weeks compared to 33 ml at 12 months. Post-void residual urine decreased according to age, and already at 9 months was less than 7 ml (mean 0.7 ml).
  
  
  CONCLUSIONS
  The dyscoordination between the sphincter and detrusor muscle seems to have already disappeared at the age of 9 months in infants who are potty trained very early. These findings suggest that potty training can be beneficial in small children with urinary tract infections or renal scars.
authors: National Hospital of Pediatrics, Hanoi, Vietnam.
authors: Thi Hoa
authors: TH
authors: Duong
authors: Ulla-Britt
authors: UB
authors: Jansson
authors: Gundela
authors: G
authors: Holmdahl
authors: Ulla
authors: U
authors: Sillén
authors: Anna-Lena
authors: AL
authors: Hellstrom
mesh_terms: D041381:Diapers, Infant / Q000706:statistics & numerical data; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D009130:Muscle, Smooth / Q000502:physiology; D011446:Prospective Studies; D014039:Toilet Training; D001743:Urinary Bladder / Q000502:physiology*; D014554:Urination / Q000502:physiology*; D014556:Urine