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I am 20 weeks pregnant, and I was told to take blood thinners. Should I take them?

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Patient's Query

Hi doctor,

I am 20 weeks pregnant at the age of 35. After my first pregnancy, I had some painless blood clots and I left them untreated. Now I was advised to take a blood thinner tablet for 100 days. On a second opinion, I was advised to stop taking it as it can lead to severe blood loss during delivery. Yesterday, I noticed some blood clots near my knee and I had pain while touching it. I also have a swelling in my knee. Do I need to start taking a blood thinner tablet now?

Kindly help.

Hi,

Welcome to icliniq.com.

Blood thinners are advised when the ultrasound or clinical examination shows a risk for hypertension or growth problems later in pregnancy or due to previous abortions or pregnancy losses or in higher maternal age. These medications can cause increased bleeding during delivery. They are usually stopped by 34 to 36 weeks. Knee swelling is unrelated to this issue. Pregnancy can cause painful effusions and swelling in joints. If you feel to have blood clots, kindly consult a gynecologist to know the cause.

Thank you.

Medically reviewed byDr. Sneha Kannan

Published At October 6, 2020
Reviewed AtMay 26, 2026

Same symptoms don't mean you have the same problem. Consult a doctor now!

Dr. Tinu Zachariah
Dr. Tinu Zachariah

Obstetrics and Gynecology

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