Premenstrual and catamenial disorders are prevalent, diversified and i
nvolve various body systems. The mechanisms and management of the mens
trually related disorders (MRDs) are hampered by a fragmented approach
because each cluster of symptoms is studied and treated by specialist
s in a number of related disciplines. The apparent common denominator
of MRDs, an association with the menstrual cycle, also carries with it
associations with ovulation and ovulation-related hormonal and cyclic
biological changes. To achieve progress in understanding and treating
MRD, an interdisciplinary nomenclature and diagnostic system are need
ed. Criteria based on temporal occurrences and not on phenomenology ha
ve been developed after interdisciplinary discussions and are herein p
roposed.