Sperm News and Research

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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.

Booze and smokes damage men's sperm

According to the latest research exposure to environmental toxins can damage sperm and the resulting defects can be passed down for generations.

20 Feb 2008

Significantly higher success rates with artificial insemination

In future a new method could help some couples who are childless against their will.

7 Feb 2008

New technique boosts success rates with artificial insemination

In future a new method could help some couples who are childless against their will. The microscopic procedure significantly improves the success rate of 'ICSI' (intracytoplasmic sperm injection).

6 Feb 2008

Why your fertility cells must have 'radio silence'

Researchers in Kobe, Japan, and Montreal, Canada, have uncovered a previously unknown mechanism which causes embryonic germ cells which later develop into sperm or ova to go through a period of "transcriptional silence," during which information from the cell's DNA cannot be copied.

31 Jan 2008

Viruses for a healthy pregnancy

Sequences of DNA in the human genome that originated from ancient viral infections have some surprising effects on our bodies and are even essential for a healthy pregnancy, according to an article in the February issue of Microbiology Today.

31 Jan 2008

Quality control mechanism tags defective sperm cells inside the body

Defective sperm cells do not pass through the body unnoticed. A new University of Missouri study provides evidence that the body recognizes and tags defective sperm cells while they undergo maturation in the epididymis, a sperm storage gland attached to the testis.

24 Jan 2008

Evolutionary phenomenon in mice may explain human infertility

Scientists at the University of Liverpool have found that field mice have evolved a unique way of ensuring faster fertilisation, a phenomenon which could explain some cases of infertility in humans.

24 Jan 2008

British scientists given go-ahead for human-animal embryo research

Scientists in Britain have been given the go-ahead to create human-animal hybrid embryos for research.

20 Jan 2008

People whose index finger is shorter than their ring finger are at higher risk of osteoarthritis

A study of more than 2,000 people, published in the journal Arthritis and Rheumatism, suggests that people whose index finger is shorter than their ring finger are up to twice as likely to suffer from the condition, which is the most common form of arthritis.

7 Jan 2008

New understanding of cell's inner workings

A group of scientists in Princeton's Department of Ecology and Evolutionary Biology has uncovered a new biological mechanism that could provide a clearer window into a cell's inner workings.

7 Jan 2008

Gene therapy can reduce long-term drinking among rodents

Just as the risk of developing alcoholism is strongly influenced by genetic factors, mutations in gene coding - such as the aldehyde dehydrogenase (ALDH2*2) allele - also appear to protect against the risk.

4 Jan 2008

The risk of osteoarthritis and index to ring finger length ratio

Index to ring finger length ratio (2D:4D) is a trait known for its sexual differences.

3 Jan 2008

Sea-cucumber protein may provide methods of preventing the transmission of malaria

Scientists have genetically engineered a mosquito to release a sea-cucumber protein into its gut which impairs the development of malaria parasites, according to research out today (21 December) in PLoS Pathogens.

28 Dec 2007

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