Ultrasonographic Imaging of the Fetal Hippocampus

Abstract Objectives: To investigate whether fetal hippocampus can be visualized in the prenatal examination with two dimentional ultrasound. Methods: This study was designed in cross-section. Healthy singleton pregnant women who applied to the Perinatology outpatient clinic for second-level ultrasound scanning between December 2022 and February 2023 were included in the study. Patients were screened consecutively. Women who have single, healthy pregnancies between 18-24 weeks of gestation were included. Demographic information of the participants was obtained and an ultrasound scan was performed. The fetal fornix - hippocampus' length and height were measured in the sagittal section. Data were presented as mean ± standard deviation, median (min, max), or number (percent). Results: A total of 92 patients were included in the study. Fetal fornix and hippocampus measurements were taken in % 97,8 (90/92) patients. The mean of the fetal fornix – hippocampus length and fetal hippocampus height of 90 patients were measured as 35.6 ± 3.0 and 4.7 ± 3.9, respectively. Conclusion: Fetal fornix and hippocampus can be visualized in easily with two dimentional ultrasound during anomaly scanning in the second trimester.