Professor Marek Lubusky, MD, PhD, MHAProfessor Marek Lubusky, MD, PhD, MHA

Lubusky M., Prochazka M., Langova M., Vomackova K., Cizek L. Discrepancy of ultrasound biometric parameters of the head (HC - head circumference, BPD - biparietal diameter) in breech presented fetuses. Bimed. Pap. Med. Fac. Univ. Palacky Olomouc Czech Repub., 2007, 151 (2), p. 323-326.


Key words: Breech presentation/Ultrasound/Fetal head/Biometry/Breech head/ Dolichocephaly

Background: A comparison of fetal ultrasonographic biometric parameters of the head (head circumference – HC, biparietal diameter – BPD) in breech presented fetuses.

Methods: Ultrasound biometry was performed in accordance with the method presented in the reference tables. In all breech presented fetuses, the HC, BPD and FL (femur length) were measured. High-risk and multiple pregnancies were excluded from the study.

Results: A total of 111 ultrasonographic biometries were performed between the 31st – 38th week of gestation. Fetuses in the breech position had a signifi cantly lower BPD compared to HC and FL. The diff erence between BPD and HC was 16.2 days (95%Cl 14.3–18.1; p = 0.001). Maternal age at delivery was 20 – 36 years (average 28.1; median 28.0).

Conclusions: According to our results, fetuses in the breech position have a signifi cantly lower BPD compared to HC or FL. HC and FL parameters correlate with gestational age. In cases of ultrasonographic biometric discrepancy between BPD and FL, the fetal position should be taken into account. Breech-presented fetuses have an elongated head shape and ultrasound biometrics should evaluate its circumference (HC). It is important to responsibly interpret the results so as not to stress the expecting mother with suspicions of fetal pathology.

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Professor Marek Lubusky, MD, PhD, MHA

Department of Obstetrics and Gynecology
Palacky University Olomouc, Faculty of Medicine and Dentistry
University Hospital Olomouc
I. P. Pavlova 6, 77520 Olomouc, Czech Republic
Tel: +420 585 852 785
Mobil: +420 606 220 644