A key assumption of ageing research is that old males are less fertile. A meta-analysis of ejaculate traits challenges this, by showing senescence is not consistently observed across 157 species of animals, but is specific to only certain taxa and ejaculate traits. The study also highlights methodological factors that might modulate the evidence for reproductive senescence.
- Krish Sanghvi
- Regina Vega-Trejo
- Irem Sepil