(Phys.org)—A team of researchers with the Institute for Integrative Nanosciences in Germany has tested the possibility of using sperm cells to deliver drugs to cancerous tumors in female patients. In their paper uploaded ...
(Phys.org)—A biologist with the University of Zurich has discovered a species of dragonfly whose females play dead to avoid copulating with other males once her eggs have already been fertilized. In his paper published ...
A tiny fruit fly has the bizarre distinction of possessing the longest sperm of any animal—20 times the length of its own body and 1,000 times that of human sperm.
Plants & Animals
Nov 18, 2015
0
254
New UC Riverside research makes it likely that proteins responsible for activating mosquito sperm can be shut down, preventing them from swimming to or fertilizing eggs.
Cell & Microbiology
Mar 16, 2023
2
107
Evolution works in mysterious ways, especially when it comes to sex.
Plants & Animals
May 24, 2017
1
315
Female promiscuity—something that occurs in a majority of species, including humans—results in the ejaculates from two or more males overlapping within her reproductive tract. When this happens, sperm compete for fertilization ...
Evolution
Sep 26, 2013
3
0
For University of Wisconsin-Milwaukee researchers studying the toxicity of gold nanoparticles - a minuscule material with potentially big biomedical applications - the road to a new medical advance may or may not be paved ...
Bio & Medicine
Jul 22, 2011
0
0
When insects skip the light fandango their romantic foreplay often involves some pretty crazy things like hypnotic dance moves and flashy colors. In some species it ends with a complex ejaculate package that does more than ...
Evolution
Jun 27, 2017
0
194
A simple, reversible chemical treatment can segregate X-bearing sperm from Y-bearing sperm, allowing dramatic alteration of the normal 50/50 male/female offspring ratio, according to a new study by Masayuki Shimada and colleagues ...
Cell & Microbiology
Aug 13, 2019
1
206
In the animal kingdom, sperm usually are considerably smaller than eggs, which means that males can produce far more of them. Large numbers of tiny sperm can increase the probability of successful fertilization, especially ...
Plants & Animals
May 25, 2016
2
19
