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.

Genomic technology revolutionizes gene discovery and disease understanding in autism

Genomic technology has revolutionized gene discovery and disease understanding in autism, according to an article published in the December 20 issue of the journal Neuron.

20 Dec 2012

Smoking and drinking have no impact on male fertility

Alcohol drinking and smoking seem to have no significant impact on male fertility, report researchers.

19 Dec 2012

Germ cell removal may promote longevity

The gonad is well known to be important for reproduction but also affects animal life span. Removal of germ cells - the sperm and egg producing cells - increases longevity of the roundworm Caenorhabditis elegans. However, the underlying molecular mechanisms were a mystery. Now scientists at the Cologne-based Max Planck Institute for Biology of Ageing, have discovered that germ cell removal flips a "molecular switch" that extends the life span by using components of a "developmental clock".

18 Dec 2012

Researchers identify possible heredity mechanism that predisposes children to ALL

Researchers at the Sainte-Justine University Hospital Center and the University of Montreal have found a possible heredity mechanism that predisposes children to acute lymphoblastic leukemia (ALL), the most common type of blood cancer in children. According to their findings published in Genome Research, the presence of a genetic defect in the egg or sperm from which children having ALL arise may be a prerequisite for the disease to develop.

17 Dec 2012

Paternal exposure to cocaine can impair gene expression and behavior in their offspring

Research from the Perelman School of Medicine at the University of Pennsylvania and Massachusetts General Hospital (MGH) reveals that sons of male rats exposed to cocaine are resistant to the rewarding effects of the drug, suggesting that cocaine-induced changes in physiology are passed down from father to son.

17 Dec 2012

Transplanting spermatogonial stem cells could restore fertility in male cancer patients

Radiation and chemotherapy can pack a powerful punch against all kinds of cancers. Those who survive, however, are often left with bad news: Their treatments have rendered them infertile.

11 Dec 2012

Celgene announces results from REVLIMID plus VIDAZA phase II study on AML

Celgene International Sàrl today announced that results from a study evaluating the combination of REVLIMID (lenalidomide) plus VIDAZA (azacitidine) in patients 60 years or older with untreated acute myeloid leukemia (AML) were presented at the American Society of Hematology annual meeting in Atlanta, GA.

11 Dec 2012

BMI influences hormone levels in overweight, obesity

A high body mass index has no significant impact on parameters of sperm quality, although it does lower serum levels of testosterone, luteinizing hormone, and prolactin, say researchers.

5 Dec 2012

University of Washington team develops electrically spun cloth to prevent pregnancy, HIV

The only way to protect against HIV and unintended pregnancy today is the condom. It's an effective technology, but not appropriate or popular in all situations.

1 Dec 2012

Longer looks: Are 'pods' the solution to our long-term care crisis?; A Liver transplant in the nick of time; Pro-life activists and the abortion drop

In November 2006, when Clara Marshall began suffering from the effects of dementia, her family moved her into ... an assisted living home in Vancouver, Wash. ... just five months into her stay, Ms. Marshall, 81, was found dead in her room apparently strangled after getting her neck caught in side rails used to prevent her from rolling out of bed.

29 Nov 2012

Pachytene piRNAs play an essential role in protecting post-meiotic germ cells

Passing one's genes on to the next generation is a mark of evolutionary success. So it makes sense that the body would work to ensure that the genes the next generation inherits are exact replicas of the originals.

16 Nov 2012

Men with wider variation in sperm length have fertility problems

Perhaps variety is the very spice of life, but as a matter of producing human life, it could be the bane of existence. That's the indication of a new study in the journal Human Reproduction that found men with wider variation in sperm length, particularly in the flagellum, had lower concentrations of sperm that could swim well. Those with more consistently made sperm seemed to have more capable ones.

14 Nov 2012

Antioxidant imbalance in abnormal sperm

An imbalance exists in oxidative stress markers, such as reactive nitrogen species, reactive oxygen species, and total antioxidant capacity, in infertile men with abnormal semen parameters, report researchers.

13 Nov 2012

Sperm viability assessed in a number of UK fertility laboratories by using Linkam’s warm stages

Market leaders in temperature controlled microscopy, Linkam Scientific Instruments, have been chosen as suppliers of warm stages to a number of laboratories in the UK for sperm assessment.

From Linkam Scientific Instruments 7 Nov 2012

Oskar gene emerged far earlier in insect evolution than previously believed

Harvard scientists have solved the long-standing mystery of how some insects form the germ cells - the cellular precursors to the eggs and sperm necessary for sexual reproduction - and the answer is shedding new light on the evolutionary origins of a gene that had long been thought to be critical to the process.

2 Nov 2012

Physically active men produce better semen quality

A new study conducted by researchers at the University of Cordoba links moderate physical activity in males with better hormone levels and sperm characteristics that favour reproduction compared to sedentary men.

1 Nov 2012

IVF process negatively impacts women’s sexual relationships

An Indiana University study has found that women undergoing in-vitro fertilization report that the process of infertility treatment has many negative impacts on their sexual relationship with their partner. Little attention has been given to the sexual dynamics of couples as they navigate infertility and treatments such as IVF, despite the important role that sex plays in a couple's attempt to conceive a child.

30 Oct 2012

Project identifies mechanism behind rapid evolution of male genitals

A new collaborative project among researchers from Uppsala University in Sweden and the University of Cincinnati has, for the first time, demonstrated experimentally the evolutionary force behind the rapid evolution of male genitals, focusing on a species of seed beetle.

26 Oct 2012

Study to examine possible link between mitochondrial DNA and ovarian cancer

Ovarian cancer is a deadly disease. With no overt symptoms and no screening tests to catch it early, ovarian cancer is often detected at stage 3 or later. By then, it can be very aggressive and may have spread beyond the ovaries into other organs. Many women eventually succumb to it; the five-year survival rate for a stage 3 ovarian cancer diagnosis is only 34 percent.

24 Oct 2012

In vitro fertilization may significantly increase risk of birth defects

In vitro fertilization may significantly increase the risk of birth defects, particularly those of the eyes, heart, reproductive organs and urinary system, according to a new UCLA study.

23 Oct 2012