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The reproductive adaptability of newly acquired female feral rhesus monkeys was evaluated by comparison of their menstrual records and progesterone levels with those of females in captivity for 3 1/2 years. Housing of the animals under conditions that simulated conditions of the breeding season in the wild resulted in a rapid adjustment with minimal periods of amenorrhoea or anovulation. Both groups of monkeys were similar with respect to menstruation and menstrual cycle length and progesterone levels.
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Barsotti et al. (1980) studied this question.
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