Can Hormonal Birth Control Cause Blood Clots? – ASH
American Society of Hematology shared a post on LinkedIn:
“True or False: Can hormonal birth control cause blood clots?
True – but the risk is very low for most people.
Hormonal birth control containing estrogen can increase the risk of blood clots, but the overall risk is low.
On average, only 3–9 out of every 10,000 women taking birth control pills will develop a clot.
This risk is lower than that of developing a clot during pregnancy or after giving birth, and it typically returns to normal within 2–4 weeks after stopping the pill.
Progestin-only methods, like hormonal IUDs and mini-pills, do not increase blood clot risk because they don’t contain estrogen.
Some people, including those with a history of blood clots, high blood pressure, smoking, or heart conditions, may need estrogen-free options.
Always talk with your doctor about personal and family health history.
Learn more at the ASH Blood Health Information Hub.”

Other posts about American Society of Hematology on Hemostasis Today.
-
Feb 25, 2026, 14:13AbQader Bedil: 7 Urgent Red Flags in a Peripheral Blood Smear
-
Feb 25, 2026, 14:07Sumedha Dash: Why Whole Blood is Rarely the Answer Anymore?
-
Feb 25, 2026, 14:05Patient Perspectives on HMB in Women with Very Rare Bleeding Disorders – EAHAD
-
Feb 25, 2026, 13:36Zoltan Nagy: Antibody Response Can Shift from Recognizing the Adenoviral Protein to Targeting PF4 in Rare VITT Cases
-
Feb 25, 2026, 13:08Sam K. Saha: Same Clot Against Fast and Slow Systems
-
Feb 25, 2026, 13:04Haykaz Muradyan: The Use of REBOA in Obstetric Haemorrhage
-
Feb 25, 2026, 12:53Jan Hartmann: NexSys Plasma Collection System Receives FDA Clearance
-
Feb 25, 2026, 12:45Zain Khalpey: Secondary Stroke Prevention as The Most Important Opportunity to Reduce Disability
-
Feb 25, 2026, 12:40Jeff June: Stroke Care Is Clinically Mature, Stroke Biology Is Still Evolving