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.

Pregnancy rates decrease and miscarriages increase when a father is over 35

Pregnancy rates decrease and miscarriages increase when a father is over 35 years of age, a scientist will tell the 24th annual conference of the European Society of Human Reproduction and Embryology (Monday 7 July). Dr. Stephanie Belloc, of the Eylau Centre for Assisted Reproduction, Paris, France, will say that this is the first time that such a strong paternal effect on reproductive outcomes has been shown.

6 Jul 2008

New way to predict IVF success

Researchers at the Stanford University School of Medicine have identified a method that can predict with 70 percent accuracy whether a woman undergoing in vitro fertilization treatment will become pregnant. This information may someday help the tens of thousands of couples who want to undergo IVF each year, and their doctors, decide on their course of action.

1 Jul 2008

Hydroxyurea treatment for sickle cell underused by doctors

Uncertainties about proper use and possible long-term effects of hydroxyurea in the treatment of sickle cell anemia may be wrongly influencing doctors to avoid prescribing it to those in serious need, according to results of a literature review by specialists at Johns Hopkins.

17 Jun 2008

Australia to enter the race to clone human embryo cells for stem-cell research

Melbourne's Monash University may be granted the first licence in Australia to clone human embryo cells for stem-cell research.

9 Jun 2008

Male painters and decorators at risk of infertility

A joint study carried out by researchers from Britain and Canada has found that exposure to certain chemicals found in paint can make men infertile.

26 May 2008

Yerkes researchers develop first transgenic nonhuman primate model of Huntington's disease

In the first study of its kind, researchers at the Yerkes National Primate Research Center, Emory University, in collaboration with researchers from the Department of Human Genetics at Emory's School of Medicine, have developed the first transgenic nonhuman primate model of Huntington's disease (HD), one of the most devastating human neurodegenerative diseases.

22 May 2008

Child's sex is associated with the mother's diet

New research by the Universities of Exeter and Oxford provides the first evidence that a child's sex is associated with the mother's diet. Published today (23 April 2008), in the journal Proceedings of the Royal Society B: Biological Sciences, the study shows a clear link between higher energy intake around the time of conception and the birth of sons.

22 Apr 2008

Sperm "on the rocks" - Using semen cryopreservation to protect amphibian species

A current research project funded by the Austrian Science Fund FWF is working to optimise the cryopreservation of amphibian sperm.

21 Apr 2008

Hormonal contraception for men

Hormonal contraception may become a safe, effective, and reversible form of birth control for men, according to a new study accepted for publication in the Journal of Clinical Endocrinology & Metabolism (JCEM).

26 Mar 2008

Discovery about fertilization points way to possible malaria vaccine

International investigations of an organism that one UT Southwestern Medical Center researcher calls a “silly little green scum” have led to key insights into the basic mechanisms of reproduction.

26 Mar 2008

Folic acid improves a man's chance of becoming a father

According to new research from the U.S. men who want to father a child will improve their chances by taking folic acid supplements.

21 Mar 2008

Low levels of dietary folate linked to sperm abnormalities

Healthy men who report lower levels of the nutrient folate in their diets have higher rates of chromosomal abnormalities in their sperm, according to a new study by researchers at the University of California, Berkeley, and the Lawrence Berkeley National Laboratory.

20 Mar 2008

Levels of folate in men's diets is linked to chromosomal abnormalities in their sperm

Researchers have found an association between a vitamin found in leafy green vegetables, fruit and pulses [1] and levels of chromosomal abnormalities in men's sperm.

20 Mar 2008

Healthy male reproductive organs depend on early hormone activity

A discovery by Medical Research Council scientists looking at the development of male foetuses could help explain the origin of common genital disorders that can cause reproductive problems or increase risk of low sperm counts and possibly testicular cancer later in life.

20 Mar 2008

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