Katharina Dalton (11 November 1916 – 17 September 2004) was a British physician and pioneer in the research of premenstrual stress syndrome. It is said that she coined the term for the syndrome.
Her books include: Once a Month: The Original Premenstrual Syndrome Handbook (1978) and Depression after Childbirth: How to Recognize, Treat, and Prevent Postnatal Depression.