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.

Conception and pregnancy put at risk by marijuana use

According to new research the use of marijuana when a woman is trying to conceive or has just become pregnant, is not recommended as it endangers the passage of the embryo from the ovary to the uterus and can result in a failed pregnancy.

2 Aug 2006

Heat treatment may zap cancer cells

Scientists believe they have discovered a clue as to why so many men with testicular cancer survive against the odds.

26 Jul 2006

Heat sensitivity may make testicular cancer cells more susceptible to standard treatments and die off more readily

Experts at Johns Hopkins have linked scientific evidence spanning more than 30 years to suggest an explanation for why testicular cancer patients like seven-time Tour de France winner Lance Armstrong survive far better than patients with other advanced cancers.

26 Jul 2006

Major genetic breakthrough in understanding of Wolbachia infection

Scientists have made a major breakthrough in understanding the genetics of the insect parasite that is being targeted by researchers as a way of preventing the spread of malaria.

25 Jul 2006

Bush adopts the so-called moral high ground and chooses to ignore scientific advice

The American President George W. Bush has used his presidential veto for the first time to block further federal taxpayers money from being used for embryonic stem-cell research.

20 Jul 2006

New diagnostic tool for prostate cancer

According to the World Health Organization there are about 250,000 new cases of prostate cancer every year but, when caught in time, the disease has a cure rate of over 90%.

19 Jul 2006

A new diagnostic tool for prostate cancer

According to the World Health Organization there are about 250,000 new cases of prostate cancer every year but, when caught in time, the disease has a cure rate of over 90%.

12 Jul 2006

World-first stem cell research may help male infertility

Scientists have shown for the first time that sperm grown from embryonic stem cells can be used to produce offspring.

10 Jul 2006

Mice sperm grown in a lab produces baby mice

In ground breaking research scientists have for the first time produced mice using sperm grown in the laboratory from embryonic stem cells.

10 Jul 2006

Vasectomies create abnormal sperm

Scientists are warning men to freeze some of their sperm before having a vasectomy because the procedure may damage sperm.

22 Jun 2006

Injection may prevent infertility in men receiving cancer chemotherapy

It may be possible to protect the testes of cancer patients against the loss of fertility caused by chemotherapy.

20 Jun 2006

New technology allows women to preserve their eggs for use later

Japanese scientists have come up with a new method of preserving human embryos which will make the process of freezing them safer and more reliable.

20 Jun 2006

New highly successful method of freezing human eggs

A new and highly successful method of freezing human eggs will help to even out the current inequality between men and women.

19 Jun 2006

New method of testing eggs for abnormalities could solve problems of embryo freezing

Italian researchers have shown for the first time that it is possible to test a woman's egg, before fertilisation, for chromosomal abnormalities that might make an embryo less likely to implant successfully or more likely to miscarry at a later stage.

19 Jun 2006

Study links high levels of nitric oxide to infertility and sperm DNA damage

Iranian scientists have linked a chemical that plays an essential role in many bodily functions to sperm DNA damage and male infertility, the 22nd annual conference of the European Society of Human Reproduction heard.

19 Jun 2006

Study results may aid battle against insect-borne diseases

Scientists studying the widespread symbiotic bacteria Wolbachia have long been interested in its ability to proliferate.

6 Jun 2006

Men have a biological clock too and produce poor quality sperm as they age

Researchers in the U.S. say that even though men are able to father children well into old age, the quality of the sperm declines as men age.

6 Jun 2006

Single embryo transfer as successful as double transfer in older women

Research by fertility experts in Finland has demonstrated for the first time that in many cases transferring a single embryo to the womb in women undergoing IVF is just as likely to result in pregnancy and a live birth in those aged 36 to 39 as it is in younger women.

1 Jun 2006

Sperm donor passes rare dangerous disease on to four children

According to a new report in the U.S., a sperm donor may have unwittingly passed an extremely rare and dangerous genetic ailment to five children born to four couples.

22 May 2006

New understanding of chromosomal glue

Researchers have a new understanding of the process cells use to ensure that sperm and eggs begin life with exactly one copy of each chromosome - a process that must be exquisitely regulated to prevent problems such as miscarriages and mental retardation.

8 May 2006