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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.

Each one of us receives 60 new mutations in our genome from parents

Each one of us receives approximately 60 new mutations in our genome from our parents. This striking value is reported in the first-ever direct measure of new mutations coming from mother and father in whole human genomes published today.

13 Jun 2011

Less-invasive Pro-Vas occlusion shows promise for permanent male sterilization

A new clinical study presented at the American Urological Association (AUA) Annual Meeting shows the less-invasive Pro-Vas occlusion as a highly promising method of permanent male sterilization.

9 Jun 2011

Non-steroidal, oral contraceptive for men

Researchers at Columbia University Medical Center are honing in on the development of what may be the first non-steroidal, oral contraceptive for men. Tests of low doses of a compound that interferes with retinoic acid receptors (RARs), whose ligands are metabolites of dietary vitamin A, showed that it caused sterility in male mice.

7 Jun 2011

Queen's University develops groundbreaking new test for male infertility

A groundbreaking new test for male infertility, which will save time, money and heartache for couples around the world, has been developed at Queen's University Belfast.

6 Jun 2011

Study links exposure to BPA with lowered male fertility

Daily exposure to a chemical that is prevalent in the human environment, bisphenol A (BPA), causes lowered fertility in male mice, according to the results of a new study that will be presented Saturday at The Endocrine Society's 93rd Annual Meeting in Boston.

6 Jun 2011

SpermComet: New test for male infertility

A new test for male infertility will save time, money and heartache for couples around the world, scientists have claimed. Queen's University Belfast said that more than a decade's research by Professor Sheena Lewis, who leads its Reproductive Medicine research group, had delivered a medical breakthrough.

5 Jun 2011

Study shows positive link between percentage of motile sperm and serum vitamin D levels

Vitamin D is important for optimal reproductive function in both animals and humans. It has long been known that serum vitamin D level is important for reproductive function in various animals, but now researchers from the University of Copenhagen and Copenhagen University Hospital have shown that this relationship can also be demonstrated in humans.

26 May 2011

Salk Institute researchers receive $5.5M Program Project Grant to analyze Williams syndrome

A multi-institutional team headed by Ursula Bellugi, professor and director of the Laboratory for Cognitive Neuroscience at the Salk Institute for Biological Studies, has been awarded a $5.5 million Program Project Grant by the National Institute of Child Health and Human Development to link social behavior to its underlying neurobiological and molecular genetic basis using Williams syndrome as a model.

21 May 2011

Cell phones increase testosterone level, but decrease fertility in men

Men who have been diagnosed with poor sperm quality and who are trying to have children should limit their cell phone use. Researchers have found that while cell phone use appears to increase the level of testosterone circulating in the body, it may also lead to low sperm quality and a decrease in fertility.

20 May 2011

Scientists identify 'de novo' genetic mutations in autism spectrum disorder children

Scientists at the University of Washington (UW) Department of Genome Sciences have identified several sporadic or "de novo" genetic mutations in children with autism spectrum disorder. The researchers applied leading edge molecular biology techniques and massively parallel sequencing to simultaneously examine all of the protein coding portions of the genome, collectively called the exome.

17 May 2011

Study finds link between high prenatal BPA levels and infant's neurobehavioral abnormalities

A new case study examining an infant's neurobehavioral abnormalities and extremely high bisphenol A concentration of the baby's mother suggests a link between the two.

12 May 2011

Maternal exposure to BPA during pregnancy linked to decrease in birth weight of children

Parental exposure to bisphenol A (BPA) during pregnancy is associated with decreased birth weight of offspring, compared with offspring from families without parental BPA exposure in the workplace, according to Kaiser Permanente researchers.

6 May 2011

FDA approves Abbott's AndroGel for hypogonadism treatment in men

Abbott announced today that the U.S. Food and Drug Administration has approved AndroGel 1.62%, a clear, odorless, gel formulation shown to restore testosterone levels in hypogonadal men with half the volume of gel at the starting dose compared to AndroGel 1%.

30 Apr 2011

Rwanda, QIAGEN and Merck launch comprehensive national cervical cancer prevention program

The Government of Rwanda, together with QIAGEN N.V. and Merck, known as MSD outside the United States and Canada, today announced the launch, in Kigali, Rwanda, of a comprehensive national cervical cancer prevention program that includes vaccination with GARDASIL [Human Papillomavirus Quadrivalent (Types 6, 11, 16 and 18) Vaccine, Recombinant] for appropriate girls 12 to 15 years of age and modern molecular diagnostic screening for women between the ages of 35 and 45.

From QIAGEN Manchester Limited 25 Apr 2011

March of Dimes honors Whitehead Institute Director for Developmental Biology work

Whitehead Institute Director David Page has been named a recipient of the 2011 March of Dimes Prize in Developmental Biology. The prize honors Page's groundbreaking body of research on the human Y chromosome.

22 Apr 2011

First-of-its-kind map of recombination hotspots in a multi-celled organism

Researchers have zoomed in on mouse chromosomes to map hotspots of genetic recombination - sites where DNA breaks and reforms to shuffle genes. The findings of the scientists at the National Institutes of Health and Uniformed Services University of Health Sciences (USU) have the potential to improve the detection of genes linked to disease and to help understand the root causes of genetic abnormalities.

6 Apr 2011

Ectopic pregnancies on the rise

Ectopic - or tubal - pregnancies can be dangerous for mothers, leading to rupture of the fallopian tube and possible hemorrhage, and they appear to be on the rise, according to a new study.

5 Apr 2011

Lilly's Axiron testosterone replacement therapy now available in US pharmacies

Eli Lilly and Company announced today that Axiron® (testosterone) topical solution is available in pharmacies throughout the United States. Axiron is a prescription medicine used to treat adult males that have low or no testosterone. Safety and efficacy of Axiron in males younger than 18 years of age have not been established.

1 Apr 2011

Panax ginseng, saffron and yohimbine can boost human sexual function

Looking to spice up your sex life? Try adding ginseng and saffron to your diet. Both are proven performance boosters, according to a new scientific review of natural aphrodisiacs conducted by University of Guelph researchers.

28 Mar 2011

Mouse sperm created in lab: Hope for male infertility

In a scientific breakthrough, researchers report that they've grown mouse sperm from testicular tissue in the laboratory, a development that could advance the field of infertility in human males. Although still proven in mice, “this is a small but important step in understanding how sperm are formed, which may, in time, lead to us being able to grow human sperm in the laboratory,” said Dr. Allan Pacey, senior lecturer in andrology at the University of Sheffield in England, who is familiar with the study results.

24 Mar 2011