Female bonobos send one of the most confusing signals in the primate world: a bright pink genital swelling that stays fully inflated long before - and long after - they're actually fertile. It looks ...

How researchers studied bonobo fertility To investigate how males cope with this unreliable fertility signal, researchers studied a group of wild bonobos at Wamba in the Luo Scientific Reserve in the ...

During daily observations, they recorded sexual behaviors and visually estimated the status of each female's genital swelling. They also used filter paper to collect urine samples of the females, ...

Learn how male bonobos use subtle behavioral and reproductive cues to pinpoint the fertile window, even when the usual swelling signal gives them almost no useful information. Female bonobos send one ...

Male bonobos can decipher females’ unreliable fertility signals, allowing them to focus their efforts on matings with the highest chance of conception, according to a study by Heungjin Ryu at Kyoto ...