This could be due to several factors. Women tend to have wider pelvises compared to men, and the left iliac vein passes between the spine and the right iliac artery, which crosses over it.

Here’s what to know. May-Thurner syndrome occurs when the left iliac vein — which carries blood from the left leg back to the heart — is compressed by the right iliac artery where they cross ...

Rebecca P. Winsett, RN, PhD, Assistant Professor, University of Tennessee Health Science Center, Memphis. Judy C. Martin, PhD, APRN, Associate Professor, College of ...