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Tag: "sperm" at biology news

Technique may allow cancer patients to freeze eggs, preserving fertility before starting treatment

...are low. Instead, researchers have found, a single sperm cell must be injected into a single oocyte, a technique called intracytoplasmic sperm injection, or ICSI. While ICSI is an established technique used in assisted reproduction, it is more...

First frozen egg baby born in Canada

...eggs were thawed and fertilized with her partner's sperm through in-vitro fertilization (IVF) and intracytoplasmic sperm injection (ICSI), and the resulting embryos implanted in her uterus. "The patient went through an u...

Cricket's finicky mating behavior boosts biodiversity

... or capsule, to be transferred contains the actual sperm cells that impregnate the female. As a species begins to split into two separate species, says Mendelson, "the songs appear to be the first characteristic that changes." During the early part of the speciation process, says Mendelson, crickets of t...

How the environment could be damaging men's reproductive health

...onmental pollutants could be changing the ratio of sperm carrying the X or Y (sex determining) chromosomes ...erm, leading to a slight increase in the number of sperm bearing the Y chromosome Aleksander Giwercman, professor of andrology at the Scanian Andrology Cent...

Sexual cooperation: Mating increases longevity in ant queens

...rrespective of whether males could transfer viable sperm or had been sterilized prior to mating. It remains...a short period early in life and store and use the sperm of their mate for the rest of their lives. Sexual offspring are only produced after several months o...

Development of portable infectious disease detector

...tydetector that can be used in the home to measure sperm motility with anaccuracy comparable to laboratory analyses."I'm thrilled at how well the VIIBRE and PRIA technologies mesh," saysJohn P. Wikswo, professor of biomedical engineering, physiology andphysics at Vanderbilt and director of VIIBRE. "We are ...

Needling Chromosomes Reveals Cell Division Secret

...on,called mitosis, as well as the proliferation of sperm and egg cellscalled meiosis."Chromosomes in mitosis and meiosis have to be held together, becauseotherwise they don’t attach to the apparatus called the spindle thatdistributes them to opposite poles," explained Nicklas, who is aResearch Professor of...

The secret lives of whales

...as found and collected skin samples from over 1100 sperm whales from some of the most remote ocean regions of the globe. He chose to sample sperm whales because they ranged worldwide and are whale icons ?thanks to Melville’s tale of Moby Dick, th...

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