While I was reading the report on Margie Profet's ''radical theory,'' which proposes that menstruation protects against sperm-borne infection ((HEALTH, . Oct. 4)), an obvious hole came to mind. Human females may engage in sexual intercourse, and thereby expose themselves to potentially harmful micro- organisms, at any time during their menstrual cycle. If a woman were to have sex the day after her menstrual period ended, it would be another three weeks before her uterine lining was again sloughed off, which is more than enough time for an infection to set in. Because of this constant risk of exposure to disease,...
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