Semen is an organic fluid, also known as seminal fluid, that usually contains spermatozoa. It is secreted by the gonads (sexual glands) and other sexual organs of male or hermaphroditic animals and can fertilize female ova. The process of discharge is called ejaculation.
The female genital tract can be a hostile environment for conception. Out of about 100 million sperm, only a few hundred make it to the fallopian tubes.
A team of researchers compared lipid profiles of sperm to learn more about their vulnerability to harmful oxidation and antioxidant capacity in different species’ semen.
Albumin activates a proton channel which allows sperm to penetrate and fertilize an egg and white blood cells to secrete large amounts of inflammatory mediators.
In this interview, AZoLifeSciences speaks to Dr. Noemi Procopio about her latest research which involved using bone proteomics to determine the length of time a corpse had been left underwater.
Many environmental and lifestyle factors have been implicated in the decline of sperm quality, with diet being one of the most plausible factors identified in recent years.
According to the Mayo Clinic, about 15% of couples are infertile, and male infertility plays a role in over one-third of these cases. Often, problems with sperm development are to blame.
Using state-of-the-art 3D microscopy and mathematics, Dr Hermes Gadêlha from the University of Bristol, Dr Gabriel Corkidi and Dr Alberto Darszon from the Universidad Nacional Autonoma de Mexico, have reconstructed the movement of the sperm tail in 3D with high-precision.
Engineers at UC Riverside's Marlan and Rosemary Bourns College of Engineering have received a $600,000 grant from the National Institute of Justice to develop a test kit that can rapidly identify body fluids at crime scenes.