Fetal tricuspid regurgitation at the 11 + 0 to 13 + 6‐week scan: association with chromosomal defects and reproducibility of the method

Abstract

At 11 + 0 to 13 + 6 weeks, TR is a common finding in fetuses with trisomies 21 and 18. Assessment of the tricuspid flow can be performed by sonographers trained in fetal echocardiography.