There is an enormous amount of research, both experimental and clinical, with respect to pain and gender. Can I suggest you go beyond MedicineNet and search Medline and PsychInfo for good research over the past 20 years or more? Some review article references are attached.
As I said, detection, or the point at which an individual indicates they experience a nociceptive input, is the same but tolerance, which is the point at which an individual says they cannot tolerate the input any more is very different between men and women. Although various influences are known, and are being studied actively, one significant factor is the presence of oestrogen. Some of the studies acknowledge gender roles (as differentiated from sex, which is around chromosomal differences), do play a part - others suggest that there are alternative issues...
gender pain refs.txt