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.

Quintuplets born to surrogate mother

In what is believed to be a world first, a surrogate mother has given birth to quintuplets.

26 Apr 2005

Guidelines for research involving human embryonic stem cells

The National Academies today recommended guidelines for research involving human embryonic stem cells, and urged all institutions conducting such research to establish oversight committees to ensure that the new guidelines will be followed.

26 Apr 2005

Ensuring patient safety at fertility clinics

In the years since the birth of the first ‘test-tube’ baby in 1978, in-vitro fertilisation (IVF) has grown to become an accepted mainstream medical technique, with more than 25,000 treatments carried out every year.

23 Apr 2005

With a complement, the sperm gets the egg

When a sperm fuses with an egg, a specific reaction takes place that exposes the inner membrane of the spermatozoa, where a protein called the complement regulator membrane cofactor protein (MCP) is expressed. MCP is an immune regulatory molecule and its presence in reproductive tissues was unclear.

21 Apr 2005

Halozyme Therapeutics receives FDA clearance for Cumulase

Halozyme Therapeutics has announced it has received 510(k) clearance from the U.S. Food and Drug Administration (FDA) for Cumulase for the treatment of oocytes to facilitate certain in vitro fertilization (IVF) procedures. The active pharmaceutical ingredient in Cumulase is the first and only recombinant human hyaluronidase approved in the United States for cumulus removal in the IVF process.

20 Apr 2005

Protein Mnd2 protects chromosome bonds

The protein Mnd2 inhibits premature separation of chromosomes during the formation of gametes. The now published discovery of this regulatory function may help to understand the origin of some common congenital chromosome defects.

30 Mar 2005

Latest findings in male reproduction research

The XVIII North American Testis Workshop, chaired by Population Council senior scientist Matthew Hardy, will be held 30 March - 2 April in Seattle, Washington. Participants will discuss findings from the large body of recent research on male reproduction.

28 Mar 2005

New research in mice sheds light on the causes behind male infertility

For 40 percent of the estimated six million American couples battling infertility, the problem lies with the man. But help may be on the way.

21 Mar 2005

Most infertile women want to choose the sex of their child

Many women being treated for infertility would choose the sex of their next child if given the option and those who were childless would choose baby girls and boys in approximately equal numbers.

14 Mar 2005

Significant number of women being treated for infertility would choose the sex of their next child

A new survey says a significant number of women being treated for infertility would choose the sex of their next child if given the option -- and those as yet childless would choose baby girls and boys in approximately equal numbers.

14 Mar 2005

Infertility - discovery could mean new treatment

A team of Japanese scientists at Osaka University led by Dr Masaru Okabe have discovered a protein essential for human sperm to fuse to an egg. The findings could well lead to new methods of treating infertility and the development of new contraceptive strategies.

9 Mar 2005

Protein circulating in the blood delivers selenium to germ cells, enabling normal development of sperm

A paper to be published in the journal Biology of Reproduction offers evidence that a protein circulating in the blood of mammals delivers the dietary micronutrient selenium to germ cells, enabling these cells to develop into normal sperm.

7 Mar 2005

HIV virus removed from fathers sperm

27 babies in Japan have been born virus-free after the virus was removed from the the sperm of HIV-positive fathers.

7 Mar 2005

British call for more sperm

The UK needs more sperm and egg donors to meet an increasing demand, the Government has announced.

26 Jan 2005

Increasing trend in society to be more open about the use of sperm donors

Two studies to be published tomorrow (Thursday 27 January) in Europe's leading reproductive medicine journal, Human Reproduction provide a generally optimistic picture about attitudes towards the increasing trend in society to be more open about the use of sperm donors.

26 Jan 2005

New ideas for creating a new generation of oral medications to treat infertility

Researchers now have a much better picture of how follicle-stimulating hormone (FSH), one of the most frequently used fertility drugs, works, and with it new ideas for creating a new generation of oral medications to treat infertility.

20 Jan 2005

Home HIV-AIDS test could be a reality within two years

A portable device similar to a home pregnancy test that can quickly detect the presence of infectious diseases, including HIV-AIDS and measles as well as biological agents such as Ricin and anthrax, is the goal of a new joint research project

17 Jan 2005

New portable infectious disease detector

A portable device similar to today's home pregnancy tests that can quickly detect the presence of infectious diseases, including HIV-AIDS and measles, as well as biological agents such as ricin and anthrax, is the object of a new joint university/industry research project.

10 Jan 2005

Old fashioned cod piece helps shield male gonads when X-rayed

Shielding the male gonads using a type of lead capsule previously only used in X-ray imaging also reduces indirect radiation to the testes during MDCT of the abdomen and pelvis, according to a new study by researchers from the University of Technology of Aachen in Germany.

5 Jan 2005

Needling chromosomes yields insights into cell division

By impaling individual chromosomes with glass needles one thousandth the diameter of a human hair, a Duke University graduate student has tested their "stickiness" to one another during cell division. Her uncanny surgical skills have added a piece to the large and intricate puzzle of how one cell divides into two -- a process fundamental to all organisms.

23 Dec 2004