I know what menstruation is:
"Menstruation, also known as a period or monthly, is the regular discharge of blood and mucosal tissue (known as menses) from the inner lining of the uterus through the vagina."
So, the uterus is not fully closed after a bilateral salpingectomy. However, is the uterus closed after a bilateral salpingectomy in the spots where the Fallopian tubes were previously attached to the uterus? That's what I am curious in finding out.