Evolution of the trait of difficulty of getting pregnant : the study on extra-high frequent copulation of wild chimpanzees.

黑猩猩是人类的近亲，它们需要相对较长的时间才能怀孕。我们在乌干达的卡林祖森林保护区研究野生黑猩猩。虽然我们直接观察了它们，但我们使用人类怀孕测试试剂盒进行了怀孕测试。从2009年开始，我们利用尿液和粪便等非侵入性样本对野生黑猩猩的激素动态进行了初步研究。

Chimpanzees are the closest relatives of human beings and it takes a relatively long time for them to get pregnant. We studies wild chimpanzees in the Kalinzu Forest Reserve in Uganda. While we observed them directly, we conducted a pregnancy test using pregnancy test kit for humans. From 2009, we started a preliminary study on hormone dynamics of wild chimpanzees using non-invasive samples, such as urine and feces.