In March, neurosurgeons and researchers in France published a large case control study in the British Medical Journal that found women who continually took the contraceptive Depo-Provera had a 550% higher chance of developing brain tumors.

Since the study came out, plaintiffs firms have been taking calls from women who took Depo-Provera and were diagnosed with a form of brain tumor called intracranial meningioma. Now, lawsuits are starting to take shape, and some of them may find a home in Philadelphia.