Can birth control cause blood clots?

Hormonal birth control methods, particularly those containing estrogen, have been associated with an increased risk of developing blood clots, including deep vein thrombosis (DVT). This is due to estrogen's impact on blood coagulation factors, which can enhance clot formation. Clinical studies have shown that women using combined oral contraceptives, patches, or rings may have a higher risk of blood clots compared to those not using hormonal contraception. However, the absolute risk remains relatively low for most women.

Healthcare providers typically assess individual risk factors when prescribing birth control. These include a personal or family history of blood clots, smoking status, age, and other medical conditions that might increase clotting risk. Patterns that raise concern for DVT usually involve symptoms like swelling, pain, warmth, and redness in one leg.

Standard evaluation for suspected DVT often includes a physical examination and imaging tests like an ultrasound. Anyone with concerns about the risk of blood clots or DVT related to birth control use should discuss their specific situation with their healthcare provider.