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  • Writer's pictureKM Hellman, PhD

What causes cramping pain?

Possibly a combination of uterine contractions, ischemia.

Using novel MRI methods our study shows that menstrual cramping pain occurs immediately and 30-70s after a decrease in myometrial T2 signal intensity. The combination of early and delayed subjective pain report – relative to a decrease in T2 weighted signal intensity – provides new evidence supportive of a contribution of myometrial activity and impaired hemodynamics to menstrual pain.

A video of results is on twitter:

Colorized MRI T2 weighted image
Colorized MRI T2 weighted image

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