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The fetal skeleton; ultrasonographic evaluation of the normal growth
J T Brons1, H P van Geijn, P D Bezemer
1Department of Obstetrics and Gynecology, Free University Hospital, Amsterdam, The Netherlands.
Insights
This study establishes normal fetal growth charts for limb bones and other measurements to aid in the prenatal diagnosis of skeletal dysplasias. These reference values help identify abnormal fetal development during pregnancy.
Area of Science:
- Prenatal Diagnosis
- Fetal Development
- Medical Imaging
Background:
- Skeletal dysplasias are a group of congenital disorders affecting bone and cartilage development.
- Accurate prenatal diagnosis of skeletal dysplasias is crucial for appropriate management and counseling.
- Establishing normative fetal growth data is essential for identifying deviations indicative of skeletal abnormalities.
Purpose of the Study:
- To present a longitudinal study of normal fetal growth.
- To establish reference values for fetal measurements relevant to skeletal dysplasia diagnosis.
- To calculate fetal limb growth rates for diagnostic purposes.
Main Methods:
- A longitudinal study involving 63 normal fetuses from 12 to 40 weeks of gestation.
- Measurements included fetal limb bone lengths, abdominal, thoracic, and head circumferences, foot length, and orbital diameters.
- Calculation of measurement ratios, limb growth rates, and determination of 10th, 50th, and 90th centiles.
Main Results:
- Comprehensive data on normal fetal growth parameters were collected.
- Ratios and growth rates relevant to skeletal dysplasia diagnosis were derived.
- Reference centile values for key fetal measurements were established.
Conclusions:
- The generated reference values provide a basis for the prenatal diagnosis of skeletal dysplasias.
- These data can assist clinicians in identifying abnormal fetal skeletal development.
- The study contributes valuable normative data for obstetric and genetic counseling.
Abstract:
A longitudinal study of normal fetal growth is presented as a basis for prenatal diagnosis of skeletal dysplasias. The lengths of fetal limb bones, abdominal circumference, thoracic circumference, head circumference, foot length and orbital diameters were measured in 63 normal fetuses between 12 and 40 weeks of gestation. From these data, ratios were calculated which may have relevance for the prenatal diagnosis of skeletal dysplasias. In addition, rates were calculated for fetal limb growth. From these parameters (absolute measurements, ratios and growth rates), the 10th, 50th and 90th centiles were determined as reference values.