What Causes the Wall of a Uterus to Thicken?

By Staff WriterLast Updated Mar 28, 2020 6:33:47 PM ET

The walls of a uterus can thicken due to pregnancy or nonpregnancy-related issues, says Radiopaedia. The uterine lining of the uterus, called the endometrium, can thicken due to the various stages of pregnancy, tumors, cysts, an intrauterine blood clot or endometrial carcinoma.