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  • Title: Aging and reproductive performance in langur monkeys (Presbytis entellus).
    Author: Harley D.
    Journal: Am J Phys Anthropol; 1990 Oct; 83(2):253-61. PubMed ID: 2248383.
    Abstract:
    Analysis of data on age and reproductive performance in 16 captive female Hanuman langurs (Presbytis entellus) shows that adult females under the age of 6 years and over the age of 19 years had the lowest rates of reproductive success as measured by the production of viable young that survived beyond 30 days of age. With the possible exception of one female, females over the age of 19 years experienced a variety of idiosyncratic reproductive problems but did not experience a true menopause as defined by total cessation of menstrual cycles. There was no support for the hypothesis that langur monkey females have evolved a lengthy postreproductive period.
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