Abstract
With the development of the E-3 Kit, routine screening assay of estriol in high risk pregnancy has recently become easier.
A new equation has been developed for a single voided urine specimen which can be substituted for technically difficult 24 hour urine collection.
This new equation is more useful than another well-known equation using creatinine value, for the following two reasons:
(1) The resulting value obtained by this equation has a closer relation to the 24 hour urine value than does that of the creatinine equation.
(2) Creatinine assay is not required.
Good relationship between this value and that of 24 hour specimens were obtained in various cases of chronic fetal distress.
Practical cases are presented and discussed.
