Sex, Gender, and Pain: A Review of Recent Clinical and Experimental Findings http://www.jpain.org/article/S1526-59… “Consistent with our previous reviews, current human findings regarding sex differences in experimental pain indicate greater pain sensitivity among females compared with males for most pain modalities, including more recently implemented clinically relevant pain models such as temporal summation of pain and intramuscular injection of algesic substances.”

Gender, Coping and the Perception of Pain http://www.sciencedirect.com/science/… “A consistent pattern of effects was found, over both behavioral and self-report measures of pain. Compared to females, males exhibited less negative pain responses when focusing on the sensory component of pain (i.e. increased threshold, tolerance and lower sensory pain).”

Culture and Gender Effects in Pain Beliefs and the Prediction of Pain Tolerance http://ccr.sagepub.com/content/34/2/1… “Consistent with their beliefs, Indian participants had higher pain tolerance than those in the United States, and males had higher pain tolerance than females.”

The effects of experimenter characteristics on pain reports in women and men http://www.sciencedirect.com/science/… “Results indicated a significant main effect for professional status of the experimenter on pain tolerance. Subjects tolerated pain longer when they were tested by a professional experimenter.”