03/07/2026
Several recent studies point to an increased risk of developing a meningioma when using the birth control shot. The progesterone in the birth control shot adds fuel for these brain tumors to develop. Progesterone itself doesn't cause meningeal cells to develop oncogenic mutations, but it helps mutated cells grow.
UCSF's David Raleigh, MD, PhD, and Jennifer Kerns, MD, MPH, weigh in on how the elevated brain tumor risk compares to other risks associated with birth control and pregnancy: https://braintumorcenter.ucsf.edu/news/meningiomas-are-associated-some-birth-control