Sperm News and Research

RSS

The term sperm refers to the male reproductive cells. In the types of sexual reproduction known as anisogamy and oogamy, there is a marked difference in the size of the gametes with the smaller one being termed the "male" or sperm cell. The human sperm cell is haploid, so that its 23 chromosomes can join the 23 chromosomes of the female egg to form a diploid cell.

Biological physics creates diagnostics of the future

Chalmers University of technology in Sweden is about to enter a new field of research - biological physics.

18 Dec 2007

Sperm's immune-protection properties could provide link to how cancers spread

Sugar-based markers on human sperm cells which may prevent them from being attacked by the female immune system could provide a vital clue to how some cancers spread in the human body, according to new research published on 14 December 2007.

14 Dec 2007

New study suggests why vaccines directed against cancer, HIV don't work

Researchers from the University of Missouri and Imperial College London have found evidence suggesting why vaccines directed against the virus that causes AIDS and many cancers do not work.

14 Dec 2007

Male infertility - epigenetics may be the underlying cause

Researchers at the University of Southern California (USC) suggest epigenetics, or the way DNA is processed and expressed, may be the underlying cause for male infertility.

13 Dec 2007

Genomic disorders occur more frequently than previously thought

Research published today in Nature Genetics shows that some rearrangements of the human genome occur more frequently than previously thought.

3 Dec 2007

First map of imprinted genes in human genome

Scientists at Duke University have created the first map of imprinted genes throughout the human genome, and they say a modern-day Rosetta stone – a form of artificial intelligence called machine learning – was the key to their success.

2 Dec 2007

First chemical evidence of a sperm recognition system in the oviducts of pigs

Adding another layer of competition to the mating game, scientists are reporting possible biochemical proof that the reproductive system of female mammals can "sense" the presence of sperm and react to it by changing the uterine environment.

19 Nov 2007

Sex ratio skew explained

If you met a person who had 10 children, all of whom were girls, you would probably find this surprising.

6 Nov 2007

Fertility diet

Women who followed a combination of five or more lifestyle factors, including changing specific aspects of their diets, experienced more than 80 percent less relative risk of infertility due to ovulatory disorders compared to women who engaged in none of the factors, according to a paper published in the November 1, 2007, issue of Obstetrics & Gynecology.

1 Nov 2007

New and safer infertility treatment produces healthy twins

The treatment known as in-vitro maturation or IVM, enables infertile couples to conceive without the need for the woman to take powerful hormonal drugs to stimulate her ovaries.

28 Oct 2007

Low-dose aspirin for in vitro fertilisation

Although it is inexpensive, easy to obtain and poses little health risk, women undergoing in vitro fertilization (IVF) cannot rely upon aspirin to help them become pregnant, according to a systematic review of nine studies.

23 Oct 2007

X chromosomes and evolution

Researchers at the University of Rochester believe they have just confirmed a controversial theory of evolution.

18 Oct 2007

Causes of male infertility

Two reports from physician-scientists at NewYork-Presbyterian Hospital/Weill Cornell Medical Center shed new light on male infertility.

18 Oct 2007

Defects in Jhdm2a gene could be the cause for some cases of male infertility

Scientists at the University of North Carolina at Chapel Hill have identified a gene crucial to the final step of the formation of a functional sperm cell.

18 Oct 2007

Contraceptive pill with no side-effects in the pipeline

Scientists in the United States are developing a new contraceptive pill with no side-effects.

17 Oct 2007

Sex once a day... on doctors orders!

The latest research into male fertility has the news all men want to hear - the more sex a man has the more fertile he becomes - at least in some cases!

17 Oct 2007

Chlamydia makes men infertile

One of the most common sexually transmitted diseases may be damaging the fertility of British males.

15 Oct 2007

Chlamydomonas reinhardtii genome holds clues for renewable energy, the environment and human health

University of Minnesota researchers contributed to a national effort to sequence the genome of an ancient, one-celled organism that will help advance research in a broad range of areas, from biofuels to restoring the environment to understanding a variety of human diseases.

12 Oct 2007

Better understanding of environmental influences on the aging process of stem cells

A stem cells' immediate neighborhood, a specialized environment also known as the stem cell niche, provides crucial support needed for stem cell maintenance.

10 Oct 2007