Most menstruating women experience some pre-menstrual syndromes (PMS) with about 20-40% seeking medical attention. A study of 62 women in the UK compared women with a learning disability but not autism to those with both a learning disability and autism. The study found that while only 11% of the non-autistic group suffered from PMS 92% of the autistic group did so.
Obaydi, H. and Puri, B.K. - Prevalence of premenstrual syndrome in autism: a prospective, observer-rated study The Journal of International Medical Research March/April 2008, 36(2), 269-272