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.

Role of toxins in inherited disease

A disease you are suffering today could be a result of your great-grandmother being exposed to an environmental toxin during pregnancy.

3 Jun 2005

Baby boy is first successful birth in Canada from frozen eggs

McGill University Health Center (MUHC) in Montreal yesterday announced the first successful birth in Canada resulting from frozen eggs. A healthy baby boy, weighing 3740 grams was born on April 29 to a 26-year-old mother who had suffered from infertility for two years.

31 May 2005

A new technique might allow women diagnosed with cancer the opportunity to have children when chemotherapy and radiation treatments rob them of their fertility

Freezing eggs is one thing; thawing them safely so they can lead to pregnancy is the challenge. In the past, efforts to freeze a woman's eggs, or oocytes, have not worked well because the cells are large. When the egg is thawed, ice crystals cause damage that prevents the egg from being fertilized.

29 May 2005

Discovery may lead to new drugs to treat cancer, control fertility

A recent discovery in cellular biology may allow scientists to enhance organ regeneration by stem cells, prevent the progression of cancer, and control fertility.

22 May 2005

Crucial to develop set of protections for women who donate eggs to stem cell research

Now that stem cell researchers have devised an efficient way of creating new human embryonic stem cell lines, biomedical ethicists at the Stanford University School of Medicine say it's crucial to develop a unique set of protections for the women who donate their eggs to make the research possible.

20 May 2005

Humans more prone to cancer than chimpanzees

Chimpanzees and humans share a common ancestor, and even today 99 percent of the two species' DNA is identical. But since the paths of man and chimp diverged 5 million years ago, that one percent of genetic difference appears to have changed humans in an unexpected way: It could have made people more prone to cancer.

15 May 2005

Fertility clinics across the United States already ensure that donated sperm is safe, regardless of the sexual orientation of the donor

The American Fertility Association (AFA) disagrees with the Food and Drug Administration's (FDA) sperm donation guidelines, which take effect on May 25, 2005.

12 May 2005

FDA seeks to ban gay men from donating sperm

The Food and Drug Administration (FDA), to the dismay of gay-rights activists, is recommending that any man who has had sex with another man in the previous five years be barred from serving as an anonymous sperm donor.

8 May 2005

Little evidence found for IVF as most effective infertility treatment

In vitro fertilization can improve pregnancy rates among couples with unexplained infertility, but there is little evidence to show whether IVF results in more live births than other treatments, according to a new review of recent studies.

1 May 2005

Pollutants appear to have an affect on sex chromosome

A team of researchers from Lund University in Sweden have found that exposure to a class of environmental pollutants can change the ratio of sperm carrying male and female chromosomes.

1 May 2005

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