Experimental and procedural pain responses in primary dysmenorrhea: a systematic review.

38 Similarly, one recent study found lower heat pain thresholds in women with PD compared to women without PD when tested on the abdomen, although these differences did not reach statistical significance. 39 Non-menstrual phase testing In a pain testing paradigm that involved distension of the uterine cervix during the mid-follicular phase, women with PD showed increased overall pain ratings and larger body areas experiencing pain from the distension, 40 compared to women without PD.

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