Korean J Obstet Gynecol.  2002 Sep;45(9):1497-1504.

Estimation of Mean Fetal Biometry by Using Ultrasonography in Normal Pregnancy

• Choi JS
• Yang JH
• Ryu HM
• Kim MY
• Han JY
• Ahn HK
• Jung SH
• Choi KH
• Lee JY
• Lee SY
• Cho JY
• Lee YH

Abstract

OBJECTIVE
The purpose of this study was to assess the mean fetal biometry and to create a formulae for estimation of gestational week using sonographic biometry measurement.
METHODS
A total 271 women of singleton gestation were involved in this study of ultrasonographic fetal biometry. During the period from June 1996 to March 1998, the length of CRL (Crown Rump Length), BPD (Biparietal Diameter), HC (Head Circumference), AC (Abdominal Circumference), HL (Humerus Length) and TL (Tibia Length) of fetuses in normal pregnancy were measured by ultrasonography at Samsung Cheil Hospital and Women's Healthcare Center. The gestational age prediction equations were derived from sigletons with the use of liner regression analysis.
RESULTS
We present the percentile ranks of fetal CRL, BPD, HC, AC, HL and TL measurement from 11 to 39 week's gestation and mean value of fetal size at each week. These data were analyzed and several second grade equations were derived from the data.
CONCLUSION
We created these authentic equations and tables for mean value of fetal biometry in normal pregnancy at each gestation week with minimal intervariable errors.

Keyword

Fetal biometry; Ultrasonography; BPD; HC; AC; FL; HL; TL

MeSH Terms

Biometry*
Delivery of Health Care
Female
Fetus
Gestational Age
Humans
Pregnancy*
Ultrasonography*