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A case of unusually early postpartum resumption of estrous cycling in a young female chimpanzee in the wild |
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| Authors: | Hiroyuki Takasaki Yukio Takahata Mariko Hiraiwa-Hasegawa Richard W Byrne Takayoshi Kano |
| Institution: | (1) Laboratory of Human Evolution Studies, Kyoto University, Sakyo-ku, 606 Kyoto, Japan;(2) Department of Anthropology, The University of Tokyo, Hongo, Bunkyo-ku, 113 Tokyo, Japan;(3) Psychological Laboratory, University of St. Andrews, Japan;(4) Department of Human Ecology, University of the Ryukyus, Aza-Uehara, Nishihara-cho, Nakagami-gun, 903-01 Okinawa, Japan |
| Abstract: | A case of unusually early postpartum resumption of estrous cycling (<7 months) was recorded for a young, presumably primiparous female in the M group of chimpanzees (Pan troglodytes schweinfurthii) in the Mahale Mountains National Park, western Tanzania. The female showed estrous cycling while lactating her infant, and mated with young and low-ranking males as well as with the alpha male. |
| Keywords: | Pan troglodytes schweinfurthii Chimpanzee Female Estrus Lactational amenorrhea |
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