Background: Menstruation appears to be problematic for women with learning disabilities, yet there has been little quantitative research on their experiences, or comparisons with other groups of women. This paper considers the nature and extent of menstrual problems experienced by women with learning disabilities. Methods: The data reported here come from a cross-sectional postal questionnaire survey conducted with carers of 452 women, aged 14-55 years, who had learning disabilities. Results: Women with learning disabilities appear to be as likely to experience menstrual problems as other women. However, such problems may be experienced differently and more negatively and may not always be recognized appropriately. Conclusions: More attention needs to be given to menstrual problems experienced by women with learning disabilities, both in research and in practice. It is particularly important that women with learning disabilities be supported to play a central role in recognizing and defining the problems they experience.