@article{oai:ir.soken.ac.jp:00003829,
 author = {長谷川, 眞理子 and TAKASAKI, Hiroyuki and TAKAHATA, Yukio and HIRAI-HASEGAWA, Mariko and BYRNE, Richard W and KANO , Takayoshi},
 issue = {4},
 journal = {Primates, Primates},
 month = {Oct},
 note = {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.},
 pages = {517--519},
 title = {A case of unusually early postpartum resumption of estrous cycling in a young female chimpanzee in the wild},
 volume = {27},
 year = {1986}
}