5 doctors weighed in:
Is it safe to take heparin in pregnancy?
5 doctors weighed in

Dr. Kevin O'neil
Obstetrics & Gynecology - Urogynecology
2 doctors agree
In brief: Yes
Heparin, a blood thinner, is used in pregnancy for a number of different conditions.
There is unfractionated Heparin and low-molecular weight heparin(lmwh). Both are given as shots. Neither cross the placenta and do not have any affect on the fetus. Unfractionated Heparin requires more monitoring than lmwh. The blood thinner to avoid in pregnancy is Coumadin (warfarin) which can cause birth defects.

In brief: Yes
Heparin, a blood thinner, is used in pregnancy for a number of different conditions.
There is unfractionated Heparin and low-molecular weight heparin(lmwh). Both are given as shots. Neither cross the placenta and do not have any affect on the fetus. Unfractionated Heparin requires more monitoring than lmwh. The blood thinner to avoid in pregnancy is Coumadin (warfarin) which can cause birth defects.
Dr. Kevin O'neil
Dr. Kevin O'neil
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Dr. Charles Greenberg
General Practice
1 doctor agrees
In brief: Yes
If needed Heparin can be administer during pregnancy.

In brief: Yes
If needed Heparin can be administer during pregnancy.
Dr. Charles Greenberg
Dr. Charles Greenberg
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1 comment
Dr. Phillip Shubert
Both unfractionated heparin as well as low molecular weight heparin are safe in pregnancy-- neither pass across the placenta.
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