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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.   view more (2008-01-24)

Sophisticated sexual behavior in roosters
In the animal world, it's common for females to mate with several males during one and the same reproductive period. This leads to sperm competition, that is, sperm from several different males compete to fertilize the egg at the same time. The most common response to increased sperm competition is... view more (2003-11-10)

Sperm created in the laboratory from embryonic stem cells produce viable progeny
Scientists have demonstrated for the first time that embryonic stem (ES) cells cultured in the laboratory can produce sperm with the capacity to produce viable offspring.   view more (2006-07-12)

Sporty Sperm: A Stiff One Gets the Job Done More Quickly
A scientist who studies the phsyics of sperm "as a hobby" is challenging the current understanding of how sperm swim towards an egg. At the Society for Experimental Biology conference today Dr Christopher Lowe will present the results of his modelling of a sperm`s tail, suggesting we may need to... view more (2002-04-10)

Stiff competition: size matters
Are longer sperm more successful than shorter sperm in the race for life? This is one of the questions Dr. Matthew Gage (University of East Anglia) will be addressing on Wednesday 31st March 2004 at the annual SEB meeting in Edinburgh (29th March - 2nd April 2004). Dr. Gage will present evidence... view more (2004-03-26)

Researchers set standard for male fertility
Researchers in Leeds and the USA have developed a ‘gold standard’ for fertile sperm, in a major step towards understanding male infertility. In an article published in The Lancet, (pp772 06/09/2002) the researchers explain how they analysed genetic fingerprints from a range of sperm... view more (2002-09-06)

Early-stage sperm cells created from human bone marrow
Human bone marrow has been used to create early-stage sperm cells for the first time, a scientific step forward that will help researchers understand more about how sperm cells are created.   view more (2007-04-13)

Genomic imprinting in disruptive spermatogenesis (p 1700)
Low sperm counts could be associated with genomic imprinting disease and could carry a raised risk of transmitting imprinting defects following assisted reproductive technologies, claim researchers in this week's issue of THE LANCET. Genomic imprinting is a gene regulatory mechanism based on... view more (2004-05-19)

Protein translation in sperm
A new paper in the February 15th issue of Genes & Development lends novel insight into the cellular changes that occur in sperm while they reside in the female reproductive tract.   view more (2006-02-15)

Mother's genes determine sperm design
A new study at the University of Sheffield, published today in Nature, has found that the size and shape of a zebra finch's sperm are genetically passed down from the mother, a fact that may also be true in humans. The paper Genetic effects on sperm design in the zebra finch, also suggests that... view more (2005-03-15)

'The snip' may have irreversible effects on sperm
Scientists call for more research into the long-term effects of vasectomy, as results revealed today(1) suggest that the effects of 'the snip' might not be as "reversible" as previously thought. Work led by Dr Sheena Lewis at Queen's University Belfast on testicular biopsies shows that... view more (2004-03-30)

Proteins in sperm unlock understanding of male infertility says new study
Proteins found in sperm are central to understanding male infertility and could be used to determine new diagnostic methods and fertility treatments according to a paper published by the journal Molecular and Cellular Proteomics (MCP).   view more (2008-10-09)

A new male-specific gene in algae unveils an origin of male and female
By studying the genetics of two closely related species of green algae that practice different forms of sexual reproduction, researchers have shed light on one route by which evolution gave rise to reproduction though the joining of distinct sperm and egg cells.   view more (2006-12-19)

World-first stem cell research could aid male infertility
Scientists have shown for the first time that sperm grown from embryonic stem cells can be used to produce offspring.   view more (2006-07-11)

Is there a risk of transmitting genetic disorders to babies conceived by fertility procedures?
As medical technology continues to advance, fertility procedures such as in-vitro fertilization and donor insemination are becoming more commonplace.   view more (2006-05-22)

Treating male infertility with stem cells
New research has examined the usefulness of bone marrow stem cells for treating male infertility, with promising results. The related report by Lue et al, "Fate of bone marrow stem cells transplanted into the testis: potential implication for men with testicular failure," appears in the... view more (2007-03-02)

Study links high levels of nitric oxide to infertility and sperm DNA damage
Iranian scientists have linked a chemical that plays an essential role in many bodily functions to sperm DNA damage and male infertility.   view more (2006-06-19)

The secret sex life of seaweed revealed
Melbourne researchers have revealed for the first time the sex lives of red seaweed using sophisticated time-lapse video microscopy. "Until now, no one knew what exactly happens when these seaweeds become sexy," says University of Melbourne researcher, Dr Sarah Wilson. "Despite the... view more (2002-08-18)

Viagra may affect fertility
Researchers from Belfast reveal today that men who take Viagra when they are hoping to start a family could be affecting their fertility. A group lead by Dr Sheena Lewis at the Department of Obstetrics and Gynaecology at Queen's University Belfast have shown that while Viagra enhances sperm... view more (2004-03-31)

Hopes raised for cancer survivors who wish to be fathers
A study at the University of Edinburgh into the fertility of men who have survived chemotherapy and radiotherapy treatment for childhood cancer and leukaemia shows that despite generally low sperm counts , the DNA carried by their sperm appears to be undamaged, posing no increased risk of cancer or... view more (2002-09-03)

Human testes may multiply mutations
The testes in humans may act as mutation multipliers that raise the odds of passing improved DNA to offspring - but that can also backfire by increasing the frequency of certain diseases.   view more (2007-08-28)

New leads in the development of an oral contraceptive for men
Latest research at Oxford University’s Glycobiology Institute has provided new leads towards the development of an oral contraceptive for men. The advantages of the substance at the centre of the research, an alkylated imino sugar (NB-DNJ), are that it does not affect reproductive hormones,... view more (2002-12-11)

Low sperm count linked to organic solvents
Men repeatedly exposed to organic solvents are over twice as likely to have a low sperm count, reports a study in Occupational and Environmental Medicine. The higher the level of exposure the greater was the risk, with professional printers and painters and decorators most at risk, the study shows.... view more (2001-09-07)

A test to prove a woman has been raped
Stray Y chromosomes can confirm an allegation of rape A TEST that can prove a woman has been raped even if no sperm are found should be widely adopted, the first large-scale study suggests.         After the trauma of rape, women who report it have to undergo... view more (2002-02-27)

Parental Smoking Around Time Of Conception Linked To Reduction In Male Births (p 1407)
Couples who smoke around the time of conception could have a reduced chance of conceiving male offspring, suggest authors of a research letter in this week's issue of THE LANCET. The male to female ratio of children has declined substantially over the past few decades. The reason for this reduction... view more (2002-04-17)
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