Common blood thinner for pregnant women proven ineffective

Posted on Friday, July 25, 2014

It's a daily injection to the belly for pregnant women at risk of developing blood clots and it's ineffective, according to a clinical trial led by researchers at The Ottawa Hospital and published today by the prestigious medical journal The Lancet.

A randomized clinical trial led by Dr. Marc Rodger provides conclusive evidence that the commonly prescribed LMWH anticoagulant has no positive benefits for the mother or child. In fact, Dr. Rodger's study shows that LMWH treatments could actually cause pregnant women some minor harm by increasing bleeding, increasing their rates of induced labour and reducing their access to anesthesia during childbirth. 

Dr. Rodger is a professor at the Faculty of Medicine at the University of Ottawa and senior scientist at the Ottawa Hospital Research Institute who heads up the Thrombosis Program of The Ottawa Hospital.

For more information, please see the Ottawa Hospital Research Institute (OHRI) press release.

Media inquiries:

Kina Leclair
Media Relations Officer
University of Ottawa
Office: 613-562-5800 ext. 2529
Cell: 613-762-2908

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