Quantcast
Last updated on April 23, 2014 at 15:23 EDT

Latest Sperm Stories

Important Step Identified In Sperm Reprogramming
2011-09-23 03:39:10

   When sperm meets egg, the chemical instructions that tag sperm cells must be erased so that human life can start anew. One way these instructions are erased is through demethylation, the removal of specific chemical tags or methyl groups that dot the underlying DNA of cells. Though scientists have known about this phenomenon for a decade, exactly how such "reprogramming" occurs has proved elusive. Now, a study from the University of North Carolina at Chapel Hill School of...

World's Largest Sperm Bank Turning Down Redheaded Donors
2011-09-19 14:23:40

The world's largest sperm bank, Cryos, said recently that it is now turning down redheaded donors because supply is currently greater than demand, according to a report by the UK's Telegraph. Cryos' director Ole Schou said that because supply has become so great in recent years, it has been able to become more picky about its donors. "There are too many redheads in relation to demand," he told Danish newspaper Ekstrabladet. "I do not think you chose a redhead, unless the partner - for...

Sperm Donor Found To Be The Father Of 150 Children
2011-09-06 12:53:44

  The New York Times reported recently that one sperm donor is the father of 150 children. According to the report, the son of a donor has found that he has 150 half-siblings who came from the same donor. Experts are concerned that this trend could result in accidental incest between children fathered by the same donor. “My daughter knows her donor´s number for this very reason,” the mother of a teenager conceived via sperm donation in California told The New...

dcc2ca08ec06abb70c15cc03b4f32cbc
2011-08-19 14:49:59

Scientists have discovered exactly how a human egg captures incoming sperm to begin the process of fertilization. The new study could help future couples who suffer from infertility. The international team of researchers found that a specific kind of sugar molecule makes the outer coat of the egg "sticky," which helps the egg and sperm bind together. "The details we've discovered here fill in a huge gap in our knowledge of fertility and we hope they will ultimately help many of those...

2011-08-04 13:36:52

Research could lead to techniques to improve fertilization in humans In new research that could have implications for improving fertilization in humans and other mammals, life scientists studied interactions between individual sperm and eggs in red abalone, an ocean-dwelling snail, and made precise chemical measurements and physical models of these interactions. They are the first scientists to do so. By simulating the natural habitat of the abalone in the laboratory, the scientists were able...

2011-04-14 21:03:08

Egg cells failing to properly arrange chromosomes Washington State University researchers have confirmed a critical step in cell division that results in age-related miscarriages and birth defects, including Down syndrome. Writing in the upcoming issue of the journal "Current Biology," the researchers say they recreated the conditions in which an egg cell will continue to undergo cell division without properly arranging its chromosomes, creating offspring with aneuploidy, or an abnormal...

2011-03-17 21:00:03

A team of researchers at the Instituto Gulbenkian de Ciência (IGC), Portugal, discovered that pollen, the organ that contains the plant male gametes, communicate with the pistil, their female counterpart, using a mechanism commonly observed in the nervous system of animals. This study not only reveals a new mechanism which underlies reproduction in plants, but also opens an exciting new avenue in the study of how cell-cell communication is conserved between animals and...

2011-03-03 12:26:01

A new study published in the International Journal of Andrology reveals that semen quality has significantly deteriorated during the last ten years in Finland, a country that previously was a region with high sperm counts. At the same time, the incidence of testis cancer in the Finnish population showed a remarkable increase, following the worrying trends observed in several countries in Europe and the Americas. Led by Jorma Toppari, MD, PhD, of the University of Turku, researchers examined...

2011-02-02 14:50:50

Study uncovers genetic hierarchy in plant sperm formation Biologists at the University of Leicester have published results of a new study into the intricacies of sex in flowering plants. They have found that a gene in plants, called DUO1, acts as a master switch to ensure twin fertile sperm cells are made in each pollen grain. The research identifies for the first time that DUO1 switches on a battery of genes that together govern sperm cell production and their ability to produce seeds.. The...

0de129abfeaf5d6d00ce41ee4c167e641
2010-10-28 09:30:00

Researchers have linked a chemical compound commonly used in the making of plastics to low-sperm counts and other reproductive issues among Chinese factory workers, according to a study published in the latest edition of the journal Fertility and Sterility. The study, which was funded by the National Institute of Occupational Safety and Health (NIOSH) and completed at the Kaiser Permanente Division of Research in Oakland, California, analyzed the urine levels of male workers in China. Those...