Mammalian sperm cannot fertilize an egg from the get-go. It's an ability acquired only after insemination, during passage through the female reproductive tract, and requires two consecutive, time-sensitive processes to provide ...
Cell & Microbiology
Aug 20, 2021
0
415
Mosquitoes are one of humanity's greatest nemeses, estimated to spread infections to nearly 700 million people per year and cause more than one million deaths.
Biotechnology
May 24, 2021
2
26
Male fertility may be the chink in the armor against climate change, according to a new study that suggests the loss of male fertility at high temperatures means many species—especially those restricted to the tropics—may ...
Plants & Animals
Apr 20, 2021
4
77
New analysis of the DNA sequence of the male-specific Y chromosomes from all living species of the great ape family helps to clarify our understanding of how this enigmatic chromosome evolved. A clearer picture of the evolution ...
Evolution
Oct 6, 2020
4
1035
Infertility is one of the most striking effects of aging. The impact of aging on females' fertility is more severe and much better understood, but it also affects males. Male reproductive aging is less researched, but of ...
Plants & Animals
Jul 6, 2020
0
116
Current tests for male fertility include measuring the concentration and motility of spermatozoa. However, other characteristics of sperm, such as their ability to follow a chemical trail to the egg, can influence the likelihood ...
Analytical Chemistry
Feb 19, 2020
0
11
In a study published in Behavioral Ecology researchers from Uppsala University show that the same type of sperm is not always the best for all male birds. Depending on how attractive or dominant you are you might be more ...
Plants & Animals
Aug 16, 2018
0
6
Male infertility tests are currently performed exclusively in labs, requiring several visits and several days to get a result. The EU-funded QS Mobile project has developed a male fertility test that can be carried out at ...
Analytical Chemistry
Aug 1, 2018
0
6
Quality sperm, good genes, and courtship knowledge are just a few reasons why females might benefit from mating with older males.
Plants & Animals
Jan 25, 2018
0
225
(Phys.org)—An international team of researchers has conducted an extensive study of male fertility and aging and has found evidence of older fathers producing less fertile offspring than younger fathers. In their paper ...
