Hello, I am 27 weeks pregnant and undergoing a 4D ultrasound. The fetus has the fourth ventricle.

Patient's question:

No

Doctor's answer:

Hello,
1. The normal value for the width of the posterior horn of the lateral ventricle is 6-8 mm, and it is acceptable as long as it does not exceed 1 cm;
2. The measurement of the width of the fetal posterior fossa by ultrasound is an indicator for prenatal screening of fetal abnormalities. Generally, ≤1 cm is considered normal. According to your ultrasound report, your test results are within the normal range, so there is no need to worry excessively.