Yaz, Yasmin and Ocella have been linked to the risk of blood clots which can cause pulmonary embolism. The types of blood clots caused by Yaz, Yasmin and Ocella are more formally known as thrombosis. Thrombosis is the formation or presence of a blood clot (thrombus) in a blood vessel. If the thrombus breaks loose and travels through the bloodstream, it is a thromboembolism. The clot may plug a vessel in the lungs (pulmonary embolism), brain (stroke), gastrointestinal tract, kidneys, or leg.
