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.

Stem cells could provide sperm for infertile males

Researchers have been successful in creating sperm-producing germ cells from stem cells in a lab and transferred them into infertile mice, which after the treatment were able to produce healthy offspring. This new development could help thousands of infertile men become fathers if the method proves similarly effective in humans.

5 Aug 2011

Longer looks: Treating Down syndrome?; mentally ill, meds & trials

Politicians want to lower spending, or at least they say they do. But in all the to-and-fro over raising the debt ceiling, little sensible has been said about lowering spending in the long term. Nothing illuminates this more clearly than health care.

5 Aug 2011

Simple ways to minimize health risks associated with cell phones

The dangers of cell phones have led to preventive policies in France, Israel, Finland, and India, and there are simple ways to minimize the health risks associated with exposure to the radiation energy they emit, according to Devra Lee Davis, PhD, MPH, President of the Environmental Health Trust, in a timely and informative interview featured in Alternative and Complementary Therapies, published by Mary Ann Liebert, Inc.

2 Aug 2011

World's best genetic map now built in African-Americans

A group of researchers from the University of Oxford, Harvard Medical School and the University of Mississippi Medical Center has constructed the world's most detailed genetic map, a tool scientists can use to better understand the roots of disease and how DNA is passed generationally to create diversity in the human species.

21 Jul 2011

Male infertility cause found in defective gene

Researchers have found a new cause of infertility that could allow millions of infertile couples around the world to have a child. The team found a common gene mutation that causes sperm to be far less able to swim through the mucus of the cervix and reach the egg.

20 Jul 2011

Two papers highlight therapeutic potential of human Sertoli cells

Two papers published in the current issue of Cell Transplantation, now freely available on-line at http://www.ingentaconnect.com/content/cog/ct/, highlight the therapeutic potential of human Sertoli cells that are present in the testes and are also called "nurse" or "mother" cells because they nurture the developing sperm cells.

12 Jul 2011

Researchers discover how genetic mutations cause rare human diseases

Researchers at the University of California, San Francisco and in Michigan, North Carolina and Spain have discovered how genetic mutations cause a number of rare human diseases, which include Meckel syndrome, Joubert syndrome and several other disorders.

11 Jul 2011

Scientists probe 'atlastin,' a protein linked to hereditary spastic paraplegia

New research from Rice University and Italy's Eugenio Medea Scientific Institute is yielding clues about hereditary spastic paraplegia (HSP), a group of inherited neurological disorders that affect about 20,000 people in the United States.

11 Jul 2011

New strategy may combat age-associated infertility and birth defects

A strategy that has been shown to reduce age-related health problems in several animal studies may also combat a major cause of age-associated infertility and birth defects.

8 Jul 2011

Gum disease linked to infertility

According to experts gum disease may reduce the chances of getting pregnant. Poor oral health is as bad for fertility as obesity - delaying conception by about two months says latest research.

7 Jul 2011

Overall risk of stillbirth low among ART children

The group looked at 60,650 singletons in a common Nordic database from ART registers in Denmark, Finland, Norway and Sweden and compared these to a control group of 360,022 naturally conceived (NC) singletons. In both groups 0.4 % of singletons were stillborn, with a definition of stillbirth as a dead child after 22 weeks of gestation.

6 Jul 2011

Fiscal problems could be mitigated by ART conceived children

In 2009, 1,547 ART children were born in public clinics in Denmark, projecting a net tax revenue of -224 million and -247 million in 25 and 50 years respectively. The authors of the study calculated that reductions of 30-50% in ART cycles following the new policy would lead to cost savings of -67 - -111 million for the Danish government in 2034.

6 Jul 2011

Cumulus cells can provide information about genetic and chromosomal status of eggs

At present, when a woman undergoes preimplantation genetic screening (PGS) in a fertility clinic, doctors are trying to select an egg or an embryo that is healthy and doesn't have a chromosome abnormality such as an extra copy of chromosome 21, which causes Down's syndrome. In order to establish this, they either have to biopsy a part of the egg called the polar body or remove a cell from the embryo for screening. Both procedures are expensive, invasive and can damage the egg or embryo.

6 Jul 2011

EIM collects data on frozen oocyte retrieval cycles for the first time

Other important data the European IVF Monitoring group (EIM) on 2008 cycles and the International Committee Monitoring Assisted Reproductive Technologies (ICMART) on 2007 cycles highlighted were Sweden's low rate of multiple births - the lowest in the world - and Spain's 30 % share of egg donations in Europe.

6 Jul 2011

Hope for fertility spreads through postcards

The campaign sends a multiplied message of hope for fertility in form of postcards with stories, including the key message on prevention and treatment. Thousands of postcards with moving stories are expected to cross Europe until October 2011.

4 Jul 2011

New insight into oocyte chromosome abnormalities

Ovarian stimulation undertaken by women of advanced maternal age receiving fertility treatment may be disrupting the normal pattern of meiosis - a critical process of chromosome duplication followed by two specialised cell divisions in the production of oocytes and sperm - and leading to abnormalities of chromosome copy numbers that result in IVF failure, pregnancy loss or, more rarely, the birth of affected children with conditions such as Down's syndrome, which is caused by the inheritance of three copies of chromosome 21.

4 Jul 2011

Researchers identify altered expression of endogenous retroviruses in BSE-infected macaques

Prion diseases such as Creutzfeldt-Jakob disease in humans and bovine spongiform encephalopathy (BSE) in cattle are transmissible neurodegenerative diseases linked to the aggregation of the prion protein in the central nervous system.

1 Jul 2011

Small 'antifreeze' molecules more effective in protecting proteins than larger ones

Scientists have made an important step forward in their understanding of cryoprotectants - compounds that act as natural 'antifreeze' to protect drugs, food and tissues stored at sub-zero temperatures.

24 Jun 2011

Paternal exposure during pregnancy may affect man's ability to father a child

According to the California Teratogen Information Service (CTIS) Pregnancy Health Information Line, more studies are needed to evaluate men and the potential effect of illnesses, medications and lifestyle habits on fertility and pregnancy. For couples suffering fertility problems, the issue is linked to the potential father approximately 50 percent of the time. In close to a quarter of these cases, a specific cause is unknown.

18 Jun 2011

Longer looks: Turning doctors' views of alternative therapies; a male birth control pill; teenagers and tanning beds

Medicine has long decried acupuncture, homeopathy, and the like as dangerous nonsense that preys on the gullible. Again and again, carefully controlled studies have shown alternative medicine to work no better than a placebo. But now many doctors admit that alternative medicine often seems to do a better job of making patients well, and at a much lower cost, than mainstream care — and they're trying to learn from it.

18 Jun 2011