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LH pulse frequency measured during daytime hours (1000–1800) both in the early follicular phase of a control, nonstressed menstrual cycle (open bars) and on the same day in a cycle with mild combined stress (move + diet) in HSR, MSR, and SS monkeys (A) and in HSR vs. animals that became anovulatory in response to mild combined stress (MSR + SS; B). *P < 0.05.
