Fetal Biometry Charts for Normal Pregnant Women in Northeastern Thailand
Piyamas Saksiriwuttho MD*, Thawalwong Ratanasiri MD*, Ratana Komwilaisak MD*
Affiliation : * Division of Fetal Diagnosis and Therapy, Department of Obstetrics and Gynecology, Faculty of Medicine, Khon Kaen University, Khon Kaen
Objectives : 1) To construct normal fetal biometry charts of fetal biparietal diameter (BPD), head circumference
(HC), abdominal circumference (AC), and femur length (FL) from 14 to 41 weeks of gestation in northeastern
Thailand. 2) To compare the results with other studies.
Study
Design : A cross sectional descriptive study.
Setting : Division of Fetal Diagnosis and Therapy, Department of Obstetrics and Gynecology, Faculty of
Medicine, Srinagarind Hospital, Khon Kaen University.
Materials and Methods : The fetuses of 635 pregnant women with an uncomplicated singleton pregnancy
between 14 and 41 weeks of gestation in northeastern Thailand from 1 October 2005 to 31 December 2006. All
recruited pregnant women enrolled had an abdominal ultrasonography for fetal biometry and the results
were compared with other studies using student’s T distribution.
Main outcome measures: Fetal biometry charts for normal pregnant women between 14 and 41 weeks of
gestation in northeastern Thailand.
Results : Six hundred and twenty eight normal fetuses from 635 pregnant women were measured for fetal
biometry charts. The comparison of the presented charts with others was significantly larger than the North in
all parameters (except AC), but was consistent to those from the South (only BPD and FL). However, when the
authors compared then with central Thailand and Western countries, there were only significant differences in
some gestational ages.
Conclusion : The authors established normal fetal biometry charts for northeastern Thai pregnant women that
could be implemented in the population of this region.
Keywords : Ultrasound, Fetal biometry, Northeastern Thailand
