Bedwetting or nocturnal enuresis is a common childhood problem, which effects 1 in 4 children. Although most children are toilet trained as they grow, still about 20% of 5-year-olds, 10% of 7-year-olds, and 5% of 10-year-olds wet the bed.  Daytime urination is controlled as children become aware of their bladder filling. Nighttime bladder control usually