Figure 1From: Epidemiology of neural tube defects and folic acidThese data were obtained from the Birth Defects Clinic attendance records. Patients with myelomeningocele seen in this clinic represent 98% of individuals with myelomeningocele born in Washington State, USA, during the period that the state maintained a Birth Defects Registry. Preliminary data for the year 2003 suggest a decline in incidence to near the lowest level observed prior to 2002.Back to article page