 Their adult height is normal as well.The incidence of Weaver syndrome is uncertain, as the causative mutation was only identified in 2011. , 48 cases of Weaver syndrome had been documented and confirmed.In 2012, the South West Thames Regional Genetic Service at St George's Hospital in London, based on their detection rate among a cohort of patients within their Childhood Overgrowth Study, estimated a prevalence rate similar to that of Sotos syndrome, around 1 in 15,000.