Zoology - Human Reproduction Question with Solution | TestHub

Normal menstrual blood does clot, menstrual blood contains not only blood but also tissue from the lining of the uterus.
The female body typically releases anticoagulants to keep menstrual blood from clotting as it's being released. But when the period is heavy and blood is being rapidly expelled, there's not enough time for anticoagulants to work. That enables clots to form.