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Growth of the fetal gall bladder in normal pregnancies
I Goldstein1, A Tamir, A Weisman
1Department of Obstetrics and Gynecology, Rambam Medical Center, Israel.
Insights
This study establishes normative fetal gallbladder dimensions across gestation, providing crucial data for assessing growth deviations and potential prenatal diagnosis of biliary duct issues.
Area of Science:
- Medical imaging
- Fetal medicine
- Anatomy
Background:
- Fetal gallbladder measurements are essential for growth assessment.
- Normative data is needed to identify deviations and potential pathologies.
Purpose of the Study:
- To establish normative dimensions of the fetal gallbladder.
- To correlate gallbladder measurements with gestational age and other biometric parameters.
- To provide a basis for prenatal diagnosis of biliary system abnormalities.
Main Methods:
- Inclusion of 183 normal pregnancies (13-40 weeks' gestation).
- Routine fetal biometric measurements including biparietal diameter, head and abdominal circumferences, and long bone lengths.
- Measurement of fetal gallbladder longitudinal and transverse diameters, with subsequent calculation of area and circumference.
Main Results:
- Linear growth function observed for fetal gallbladder dimensions across gestational age.
- Significant positive correlations found between gestational age and gallbladder diameters, area, and circumference.
- Strong correlations noted between gallbladder measurements and fetal biometric parameters like biparietal diameter, abdominal circumference, and femoral length.
Conclusions:
- The study provides comprehensive normative data for fetal gallbladder dimensions.
- These data are valuable for monitoring fetal growth and development.
- The findings support the potential for prenatal diagnosis of extrahepatic biliary duct system lesions.
Abstract:
Our objective was to obtain dimensions of the fetal gall bladder as a basis, for further studies and to establish normative data to assess deviations in growth. The study group included 183 normal pregnant women from 13 to 40 weeks' gestation. Routine biometric measurements were obtained on all fetuses, including biparietal diameter, head and abdominal circumferences and measurements of the long bones and the two diameters of the fetal gull bladder. The gall bladder area and circumference were calculated for each gestational age.A linear growth function was observed across the gestational age and a first-degree correlation was found to exist between gestational age and both the longitudinal (r = 0.77067; p < 0.00001; y = -0.41060 + 0.0907 x gestational age) and transverse (r = 0.602; p < 0.00001; y = 0.58567 + 0.01925 x gestational age) diameters of the fetal gall bladder. A significant correlation was also found between gull bladder area and gestational age (r = 0.6878; p < 0.00001), biparietal diameter (r = 0.72768; p < 0.00001), abdominal circumference (r = 0.71363; p < 0.00001) and femoral length (r = 0.72190; p < 0.00001). In addition, a significant correlation was found between gall bladder circumference and gestational age (r = 0.76181; p < 0.00001), biparietal diameter (r = 0.80039; p < 0.00001), abdominal circumference (r = 0.78030; p < 0.00001) and femoral length (r = 0.79694; p < 0.00001). These results provide normative data of the fetal gall bladder in various dimensions and across gestational age. In addition, the data offer the potential for prenatal diagnosis of additional lesions in the extrahepatic biliary duct system.