Reference charts for fetal corpus callosum length in the early second trimester: a prospective cross-sectional study.

Objective: This study aimed to establish normal reference ranges for fetal corpus callosum (CC) measured by prenatal ultrasonography (USG) between 16 and 25 weeks of gestation in healthy fetuses.

Material And Method: A total of 809 fetuses in the second trimester were evaluated by transabdominal USG. All measurements were obtained by a single clinician.