From: Role of trans-abdominal and trans-perineal venous duplex ultrasound in cases of pelvic congestion syndrome
Mean diameter ± SD
Diameter range
Left gonadal vein
7.9 ± 1.1 mm
6.5-12 mm
Right gonadal vein
4.0 ± 0.8 mm
2.9–6.4 mm
Right gonadal vein with pathological reflux
5.9 ± 0.4 mm
5.5–6.4 mm