What do I need to know? Click on a category to learn what you need to know about blood clots. > I have never had a blood clot. > I have experienced a clot (deep vein thrombosis or pulmonary embolism). > I am a woman on or considering contraceptives. > I am a woman on or considering hormone replacement therapy. > I am pregnant > I am a woman who has experienced a pregnancy loss. > I am a patient with cancer. > I am traveling.