Does A Blood Clot During Pregnancy Cause Miscarriage?

It depends upon size of blood clot. If you have passed small sized blood clot during early stages of pregnancy then it can be normal. Large clots along with cramps can be due to miscarriage. Anyhow, any bleeding or blood clot during pregnancy should not be ignored and should be  discussed with doctor.

Yes a blood clot can cause miscarriage my obgyn has diagnosed me with a blood clotting disorder called  Thrombophilia or hypercoagulability.
How is a thrombophilia treated during pregnancy?
Treatment depends on the specific type of thrombophilia and whether or not a woman has had a blood clot in the past. Some women with a thrombophilia may not need treatment.
Women with a thrombophilia who have a history of blood clots are usually treated with an anticoagulant during pregnancy and the postpartum period. Women with certain severe, inherited thrombophilias (such as antithrombin deficiency) also are usually treated, even if they have not experienced blot clots (7). During pregnancy, these women are generally treated with an anticoagulant called heparin (given by injection one or more times daily) or a newer version of the drug called low-molecular weight heparin. These drugs do not cross the placenta and are safe for the baby. After delivery, some women with a thrombophilia may be treated for about 6 weeks with an oral anticoagulant called warfarin, in addition to, or instead of, heparin. Warfarin is safe to take during breastfeeding, but it is not recommended during pregnancy because it crosses the placenta and can cause birth defects.

Women with APS who have a history of blood clots and/or repeated pregnancy loss are usually treated with anticoagulants during pregnancy and the postpartum period. Low doses of aspirin may be recommended along with heparin for some women with APS. Studies suggest that the combination is more effective than either medication alone in preventing pregnancy loss (5, 7).

Not all women with a thrombophilia need treatment during pregnancy. A woman and her health care provider should discuss her individual risks of blood clots and pregnancy complications and the severity of her thrombophilia before deciding whether or not she needs treatment. Heparin treatment does pose some risk of side effects, including bone loss and potentially dangerous blood changes. The risks appear lower with low-molecular weight heparin.

Treatment may not be recommended for pregnant women with one of the less severe thrombophilias (such as factor V Leiden or prothrombin mutations) who have no personal or family history of blood clots (1, 7). The risk of VTE is less than 0.2 percent (1 in 500) in pregnant women with factor V Leiden with no personal or strong family history of VTE (1). In some cases, treatment may be recommended after a cesarean delivery.

I hope this helps I have to see a specialist from osu hospital to find out what treatment they want to use in my case but it is great to know it is treatable. Good luck! :)

Absolutely not! I have a factor 5 and factor 2 gene mutation, and protien c and s deficiency. We didnt know I had these things until I was 18 weeks pregnant, with a huge clot in my leg. My son was born at 38 weeks, happy and healthy.

A blood clot can be very serious for your baby. I won't go into everything that this will involve because you don't need to be stressing out over this anymore than you are. Take note that your Dr will watch you very carefully and will do what needs to be done to help you and your baby. Remember this all depends how big the clot is& where it is located. Stress is very bad for this also.

Well I didnt come on period for a month and then I started bleeding and I didnt know what to do. Thankfully I was in a mental hospital and the male nurse helped me walked to the doctor at the Hospital. The doctor then said I need an ambulance I got an ambulance and went to the hospital. If you don't come on your period for a month and have very bad pains nothing like period pains. You might of had a miscarriage if you have these pains make sure go ask somebody medical trained before going to the hospital. There horrible things to happen. Miscarriage can happen through stress  I Had a miscarriage through stress and I had horrible pains and a big clot of blood that fell out when I went to the toilet.