Affiliation:
1. Department of Obstetrics and Gynecology and the Department of Clinical Chemistry County Hospital Helsingborg
2. Department of Statistics University of Lund Sweden
Abstract
Investigating 60 individual serum total estriol (S‐E3) courses from normal pregnancies, we found individual S‐E3 courses parallel with the general mean, but with half the standard deviation. Thus one can predict the individual S‐E3 course, which may function as a reference for every S‐E3 estimation later on. A S‐E3 decrease of more than 33 per cent from the individual mean is statistically significant at the 2.5 per cent level.