Response to Letter to the Editor

We appreciate very much that our article “Comparison of Current Swiss Fetal Biometry Reference Charts with Reference Charts from 1999. Are Fetuses Getting Bigger?” [1] has found interested and critical readers.

• References

• 1 Knitza J, Kurmanavicius J, Faschingbauer F. et al. Comparison of Current Swiss Fetal Biometry Reference Charts with Reference Charts from 1999. Are Fetuses Getting Bigger?. Ultraschall in Med 2018;
• 2 Kurmanavicius J, Wright EM, Royston P. et al. Fetal ultrasound biometry: 1. Head reference values. Br J Obstet Gynaecol 1999; 106: 126-135
• 3 Salomon LJ, Bernard JP, Duyme M. et al. The impact of choice of reference charts and equations on the assessment of fetal biometry. Ultrasound Obstet Gynecol 2005; 25: 559-565
• 4 Balsyte D, Schaffer L, Burkhardt T. et al. Continuous independent quality control for fetal ultrasound biometry provided by the cumulative summation technique. Ultrasound Obstet Gynecol 2010; 35: 449-455