title: Control chart for urinary oestriol excretion during pregnancy.
abstract: Calculations to define the distribution of normal urinary oestriol excretion values during pregnancy are presented. The values had a normal distribution, uniform variance and increased linearly with time after logarithmic conversion. The variance could, therefore, be partitioned and a control chart constructed.
mesh_terms: D000704:Analysis of Variance; D004964:Estriol / Q000652:urine*; D005260:Female; D006801:Humans; D011247:Pregnancy; D012016:Reference Values
chemical_list: D004964:Estriol