Liam Dougherty at the University of Western Australia and his colleagues have now found a correlation between the thickness of female reproductive tracts and the length of penis spikes in 13 independently bred populations of the cowpea seed beetle (Callosobruchus maculatus). (newscientist.com)
Our proof of principle study has determined that while the upper female reproductive tract certainly isn't teeming with bacteria, there are bacteria present.» (sciencedaily.com)
These processes, collectively known as postcopulatory sexual selection, drive a myriad of rapid, coordinated evolutionary changes in ejaculate and female reproductive tract traits. (sciencedaily.com)