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.

Live demonstration of robotic radical prostatectomy

One of the nation's top robotic surgeons will remove the cancerous prostate of a Southern Tier man during a live demonstration of robotic surgery on Wednesday, March 19.

19 Mar 2008

Penn researchers identify first sex chromosome gene involved in meiosis and male infertility

A team of scientists led by University of Pennsylvania veterinary researchers have identified a gene, TEX11, located on the X chromosome, which when disrupted in mice renders the males sterile and reduces female fecundity.

17 Mar 2008

Cryptorchidism and hypospadias

Cryptorchidism, the absence in the scrotum of one or both testes (usually because of the failure of the testis to descend), and hypospadias, the abnormal positioning of the opening of the urethra, are common birth defects of the male genitalia and are risk factors for the adult-onset disorders of low sperm count and testicular cancer.

14 Mar 2008

Home test kit confirms men's post-vasectomy sterility

Technology developed at the University of Virginia could soon have a dramatic impact on male contraception practices throughout the U.S. Earlier this year, the U.S. Food and Drug Administration approved SpermCheck Vasectomy, a home test that confirms men's post-vasectomy sterility and is based on discoveries made at U.Va.

12 Mar 2008

Prader-Willi syndrome - new genetic clues

A new mouse model for a genetic cause of obesity has been developed by scientists at the Stanford University School of Medicine and Lucile Packard Children's Hospital.

6 Mar 2008

Decline in cystic fibrosis since introduction of prenatal carrier screening

A brief report in the February 28, 2008, New England Journal of Medicine, led by researchers at the New England Newborn Screening Program (NENSP) of the University of Massachusetts Medical School (UMMS), indicates a declining incidence of a genetic disease, providing what may be the first demonstration of a link between two independent population-based screening programs.

28 Feb 2008

Mix of endocrine disrupters a dangerous cocktail

Endocrine-disrupting chemicals, which are harmless individually in small doses, can together be a dangerous cocktail.

20 Feb 2008

Booze and smokes damage men's sperm

According to the latest research exposure to environmental toxins can damage sperm and the resulting defects can be passed down for generations.

20 Feb 2008

Significantly higher success rates with artificial insemination

In future a new method could help some couples who are childless against their will.

7 Feb 2008

New technique boosts success rates with artificial insemination

In future a new method could help some couples who are childless against their will. The microscopic procedure significantly improves the success rate of 'ICSI' (intracytoplasmic sperm injection).

6 Feb 2008

Why your fertility cells must have 'radio silence'

Researchers in Kobe, Japan, and Montreal, Canada, have uncovered a previously unknown mechanism which causes embryonic germ cells which later develop into sperm or ova to go through a period of "transcriptional silence," during which information from the cell's DNA cannot be copied.

31 Jan 2008

Viruses for a healthy pregnancy

Sequences of DNA in the human genome that originated from ancient viral infections have some surprising effects on our bodies and are even essential for a healthy pregnancy, according to an article in the February issue of Microbiology Today.

31 Jan 2008

Quality control mechanism tags defective sperm cells inside the body

Defective sperm cells do not pass through the body unnoticed. A new University of Missouri study provides evidence that the body recognizes and tags defective sperm cells while they undergo maturation in the epididymis, a sperm storage gland attached to the testis.

24 Jan 2008

Evolutionary phenomenon in mice may explain human infertility

Scientists at the University of Liverpool have found that field mice have evolved a unique way of ensuring faster fertilisation, a phenomenon which could explain some cases of infertility in humans.

24 Jan 2008

British scientists given go-ahead for human-animal embryo research

Scientists in Britain have been given the go-ahead to create human-animal hybrid embryos for research.

20 Jan 2008

People whose index finger is shorter than their ring finger are at higher risk of osteoarthritis

A study of more than 2,000 people, published in the journal Arthritis and Rheumatism, suggests that people whose index finger is shorter than their ring finger are up to twice as likely to suffer from the condition, which is the most common form of arthritis.

7 Jan 2008