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Gender-specific weight estimation of fetuses between 2,501 and 3,999 g--new regression formulae
Jörn Siemer1, Antonia Hilbert, Tanja Wolf
1Department of Obstetrics and Gynecology, Mannheim University Hospital, Mannheim, Germany. joern.siemer@gyn.ma.uni-heidelberg.de
Objective:
To develop new gender-specific regression formulae to estimate fetal weight focusing on a particular weight range from 2,501 to 3,999 g.
Methods:
3,254 singleton pregnancies were included to generate new regression formulae for female and male fetuses, and to evaluate their accuracy.
Results:
In comparison with commonly used formulae, the new gender-specific and weight-range-specific method of fetal weight estimation provided greater accuracy. The mean absolute error was less than 7%.
Conclusions:
When properly used, the new formulae can improve the accuracy of weight estimations in fetuses between 2,501 and 3,999 g.
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