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.

Artificially replicating the male genome may help infertile men

Artificially replicating the male genome could help men with very low sperm counts become fathers, a scientist told the 23rd annual conference of the European Society of Human Reproduction and Embryology.

4 Jul 2007

Complex assisted reproduction procedures more likely to lead to umbilical cord abnormality

The more complex the assisted reproduction procedure, the more likely the umbilical cord develops in an atypical place or have other abnormalities, a scientist told the 23rd annual conference of the European Society of Human Reproduction and Embryology.

4 Jul 2007

High frequency of sperm abnormalities associated with reduced testicular volume in male lupus patients

The prognosis for systemic lupus erythematosus (SLE), an autoimmune disease that mainly affects women in their reproductive years, has improved recently, prompting a shift toward improving quality of life.

29 Jun 2007

New type of mouse embryonic stem cell discovered

Scientists have discovered a new type of mouse embryonic stem cell that is the closest counterpart yet to human embryonic stem (ES) cells, the National Institutes of Health (NIH) have announced.

28 Jun 2007

Discovery of gene and mechanism essential to the embryonic development of the epididymis

Human sperm cells travel up to 6 meters in their transit from testes to penis, and most of that journey occurs in the epididymis, a tightly coiled tube that primes the cells for their ultimate task: fertilization.

28 Jun 2007

Ethical dilemma of international tissue donation

When the world's poorest sell their bodies to the world's wealthiest in the international tissue donation market they often secure their economic health at the cost of their physical health.

19 Jun 2007

Health of babies not affected by embryo screening

New research has shown that babies born after pre-implantation genetic diagnosis (PGD) are as healthy as those born after conventional IVF treatment.

18 Jun 2007

Scientists look at slow-freezing techniques for human tissue

The goal is to make human eggs, ovarian tissue, blood vessels, even whole organs available when needed.

8 Jun 2007

Embryonic stem cells can be created without eggs

Embryonic stem cells are unique because they can develop into virtually any kind of tissue type, an attribute called pluripotency.

8 Jun 2007

Preparing for a baby

Planning for pregnancy can help your baby get the best possible start in life. Here are eight valuable tips from Barbara Coulter-Smith, D.O., an obstetrician/gynecologist on the medical staff at Baylor Regional Medical Center at Grapevine.

8 Jun 2007

Men who smoke risk genetic damage to their sperm which is passed on to their children

According to Canadian researchers children could inherit genetic damage from a father who smokes.

3 Jun 2007

Smoking can cause changes in the DNA sequence of sperm cells

The science has long been clear that smoking causes cancer, but new research shows that children could inherit genetic damage from a father who smokes.

3 Jun 2007

Double-standard exists in the way that men and women donors are valued by the fertility industry

When Sociologist Rene Almeling decided to look into the operations of U.S. sperm banks and egg agencies, the UCLA Ph.D. candidate in sociology thought she knew what she would find.

24 May 2007

Sheep offer model for undernourishment in pregnant teen girls

Two papers selected for publication in the August 2007 issue of Biology of Reproduction demonstrate that adolescent female sheep that become pregnant before they have achieved their full growth may not be able to supply enough nourishment for their fetuses to develop without physical deficits.

24 May 2007

Cornell University establishes Center for Reproductive Genomics

Cornell University has established the Center for Reproductive Genomics, which will combine basic research in reproductive sciences on Cornell's Ithaca campus with one of the country's leading fertility clinics at Weill Cornell Medical College (WCMC) in New York City.

10 May 2007

Males have evolved to deliver sperm more effectively to females with multiple partners

A review of the latest research in sexual adaptation shows that evidence is building for what researchers call "sperm competition."

9 May 2007

Sperm from diabetic men have greater levels of DNA damage which may affect their fertility

In the first study to compare the quality of DNA in sperm from diabetic and non-diabetic men, researchers at Queen’s University Belfast showed that the DNA in the nuclei of the sperm cells had greater levels of fragmentation in diabetic men, and that there were more deletions of DNA in the tiny, energy-generating structures in the cells called mitochondria.

8 May 2007