What Is Normal Csp

Conclusions: In normal fetuses the CSP should always be visualized between 18 and 37 weeks, or with a BPD of 44-88 mm. Failure to observe the CSP in this interval, or possibly the presence of a large CSP, may indicate abnormal cerebral development and warrant further investigation.

What causes CSP?

Cause. The cause of CSP is basically unknown, although it is thought that prenatal alcohol exposure plays a significant role.

When does the CSP develop?

The cavum septi pellucidi (CSP) is an important landmark in evaluation of the fetal brain and has become integral to both routine and detailed ultrasound examinations1. Development of the CSP begins at c. 10–12 weeks and it is fully formed by 17 weeks of gestation2.