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  • Title: A biometric study of the fetal orbit and lens in normal pregnancies.
    Author: Sukonpan K, Phupong V.
    Journal: J Clin Ultrasound; 2009 Feb; 37(2):69-74. PubMed ID: 18932266.
    Abstract:
    PURPOSE: To construct nomograms of the size of the fetal orbit and lens and to evaluate the relationships between the gestational age and the biometry of the fetal orbit and lens. METHOD: Six hundred two normal pregnant women were evaluated from 15 to 40 weeks of gestation. Fetal orbital and lens measurements were added to routine biometric measurements for normal fetuses. RESULTS: A total of 595 measurements were used for analyses. A strong linear correlation was observed between gestational age and orbital diameter, orbital circumference, and orbital surface. A linear correlation was also found between gestational age and lens diameter, lens circumference, and lens surface. A linear growth function was observed between biparietal diameter and both the orbital diameter and the lens diameter. CONCLUSION: Orbital and lens measurements provide data that correlate with fetal growth and development. These data may also help detect fetal ocular abnormalities.
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