Sentences with phrase «swimming sperm»
The phrase "swimming sperm" refers to the movement of tiny cells in semen called sperm, which are important for fertilizing an egg and creating a baby. They swim towards the egg in a fluid called semen. Full definition
The device uses a field of three - dimensional posts that create an obstacle course for swimming sperm cells.
sciencedaily.com
Strong swimming sperm's secret A gene variant can make sperm strong and speedy, a study of wild mice suggests.
Dr Andrew Povey, from the University of Manchester's Institute of Population Health, said: «This research builds on our study of two years ago which looked at the risk factors associated with the number of swimming sperm (motile concentration) in men's ejaculates.
Dr Clair Bennison from the University's Department of Animal and Plant Sciences, said: «We know that in the zebra finch, long sperm swim faster than short sperm, so we might expect longer, faster swimming sperm to simply reach the egg first.
The male factor involves structural abnormalities in a man's reproductive system that may block the flow of sperms together with low sperm count and slow swimming sperms.
Here [she shows a video] we compare isolated swimming sperm tails to free - swimming spirochetes.
Ferns and mosses use swimming sperm to procreate, and thus biologists had assumed they didn't need a pollinator's services.
The results, published January 27 in the Proceedings of the National Academy of Sciences, suggest that the male contribution to conception and development is far more than a few swimming sperm.
Holt and his colleagues have shown statistically that faster swimming sperm were more likely to penetrate an unfertilised egg.
It uses a field of three - dimensional posts that create an obstacle course for the swimming sperm cells.
A fast - swimming sperm is one that is efficiently shaped, with a bullet - like head and whipping tail.
Sexual competition persists long after mating, all the way down to the proteins that put an efficient head on a swimming sperm.
And while there are already sorting methods that select the fastest - swimming sperm, a new microfluidic device also ensures that they're the healthiest.
If you strolled onto the grounds of the Southbank Centre over the summer, you'd catch a flag by Tracy Emin emblazoned with «One secret is to save everything» printed over a field of swimming sperm.