Narges Nahavandi - Obstetrician and Gynecologist, Perinatology Fellowship, Obstetrics and Gynecology Department, Tehran University of Medical Sciences, Shariati Hospital, Tehran, Iran.
Ashraf Jamal - Obstetrician and Gynecologist Professor, Perinatology fellowship, Obstetrics and Gynecology Department, Tehran University of Medical Sciences, Shariati hospital, Tehran, Iran.
Maryam Moshfeghi - Obstetrician and Gynecologist, Perinatology Fellowship, Royan Institute, Department of Endocrinology, Reproductive Biomedicine Research Center, ACECR, Tehran, Iran.
Fatemeh Etemad - Obstetrician and Gynecologist, Infertility Fellowship, Metabolic Diseases Research Center, Research Institute for Prevention of Non-Communicable Diseases, Qazvin University of Medical Sciences, Qazvin, Iran.

Background: We aimed to assess the relationship between fetal lateral ventricular width and biometric measurements with ultrasound examination. Materials and Methods: A prospective case-control study on ۱۷۸ fetuses as the control group with lateral ventricle diameter ۴-۷.۹ mm and ۸۰ fetuses as the case group with lateral ventricle diameter ۸-۱۲ mm. The study was done at Shariati hospital (Tehran, Iran), from ۲۰۱۵ to ۲۰۱۹. All patients underwent a detailed ultrasound exam according to ISUOG guideline and biometric measurements, including head circumference, biparietal diameter, abdominal circumference, femur length, humerus length, cerebellar diameter, cisterna magna width, average ultrasound gestational age, and estimated fetal weight were done. At least two follow-up ultrasound examinations at ۲۶-۲۸ weeks of gestational age and ۳۲-۳۴ weeks of gestational age were performed to evaluate ventricle size, and fetuses with lateral ventricle width above ۱۲ mm were excluded. Then we compared fetal biometric measurements, mentioned above, in these groups. Results: The mean maternal age, maternal past medical history, obstetrical history, mode of conception, fetal presentation, and fetal gender did not differ between the groups. We compared ۱۸۷ patients as the control group with ۸۰ patients as the case group at the same gestational age and gender. The mean ventricular width in the case group was ۸.۶ mm, and in the control group was ۵.۹mm. The study group had significantly larger head circumference, biparietal diameter, femur length, and estimated fetal weight compared with the control group (p <۰.۰۵). Conclusion: The lateral ventricular width is dependent on other biometric parameters such as head circumference, biparietal diameter, and generally fetal size, and larger ventricle width is associated with larger parameters.

Biometric, Fetal, Cerebral Ventriculomegaly, Lateral Ventricle, Ultrasound