New reference values for ultrasound fetal biometry in Japanese population and comparison with other studies.

ABSTRACT: Given the decline in birthweights over the past 30 years in Japan and advancements in ultrasound technology, this study aimed to establish new reference values for ultrasound fetal biometry in Japan and to compare them with international and Asian studies. We conducted a cross-sectional prospective study involving singleton pregnancies who received prenatal checkups at obstetric facilities across Japan. During routine prenatal care, ultrasound measurements-biparietal diameter (BPD), head circumference (HC), abdominal circumference (AC), and femur length (FL)-were recorded. Estimated fetal weight (EFW) was calculated using both the Shinozuka formula, commonly used in Japan, and the Hadlock-3 formula, widely used internationally. Using the collected data, we developed gestational-age-specifi

SUBMITTER: Nagasaki S 

PROVIDER: S-EPMC12368127 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature