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The corpus callosum: normal fetal development as shown by transvaginal sonography
1Department of Obstetrics & Gynecology, Sackler Faculty of Medicine, Tel-Aviv University, Edith Wolfson Medical Center, Holon, Israel.
AJR. American Journal of Roentgenology
|November 1, 1993
Summary
Transvaginal sonography successfully detects the corpus callosum (a brain structure) in fetuses. This study provides reference data for its normal growth and development during pregnancy.
Area of Science:
- Medical imaging
- Fetal development
- Neuroanatomy
Background:
- Detection of the corpus callosum in developing fetuses using sonography is often challenging.
- Understanding the normal appearance and development of the fetal corpus callosum is crucial for prenatal diagnostics.
Purpose of the Study:
- To determine the normal appearance and development of the fetal corpus callosum.
- To establish reference data for the corpus callosum during the second half of pregnancy using transvaginal sonography.
Main Methods:
- One hundred one fetuses were assessed using transvaginal sonography between 18 and 42 weeks' gestation.
- Measurements included the length of the corpus callosum and the thickness of its genu, body, and splenium.
- Growth tables were generated based on these measurements.
Main Results:
- The corpus callosum was visualized in 95% of fetuses.
- A linear growth pattern was observed, increasing from approximately 17 mm at 18 weeks to 44 mm at term.
- The ratio of corpus callosum length to the brain's anteroposterior diameter remained consistent from 20-21 weeks to term.
Conclusions:
- Transvaginal sonography is effective for visualizing and measuring the fetal corpus callosum.
- The data presented serve as a valuable reference for assessing normal fetal corpus callosum development.