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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.

Some IVF techniques leading to more bundles in blue: Study

According to a new study by Australian researchers some infertility treatments may influence the sex of a baby to such an extent that increased uptake could upset the gender balance later. The study shows that a type of IVF treatment increases the chance of having a boy to as much as 56.1 per cent, while another treatment cuts it to 48.7 per cent.

29 Sep 2010

Genomic imprinting can influence carrier's selfish or altruistic behavior

If you are more inclined to love thyself than thy neighbor, it could be your mother's fault. Those are the findings of Francisco -beda, assistant professor of ecology and evolutionary biology at the University of Tennessee, Knoxville.-beda, along with fellow evolutionary biologist Andy Gardner from Oxford University, examined the impact that genomic imprinting has on the carrier's selfish or altruistic behavior.

23 Sep 2010

New sperm freezing technique may be a boon for IVF

A new improved method of freezing and storing sperm for future use in infertility treatment has arrived as a boon for couples wanting babies.

16 Sep 2010

Success of assisted reproduction procedures linked to season

The success of an assisted reproduction procedure may depend on the season. This is the finding of new work presented at the World Congress of Fertility and Sterility, in Munich, Germany.

14 Sep 2010

Less-invasive alternative to vasectomy

Pro-Vas® – the new faster, less-invasive alternative to traditional vasectomy – was featured Thursday in millions of homes and doctors' offices across the nation on "The Doctors" TV show. This nationally syndicated show highlights significant advancements in the world of health and medicine.

13 Sep 2010

Researchers discover mechanism that prevents stem cell from becoming another cell type

Johns Hopkins researchers have determined why certain stem cells are able to stay stem cells.The report in the June 4 issue of Cell Stem Cell reveals that an enzyme that changes the way DNA is packaged in cells allows specific genes to be turned on and off, thereby preventing a stem cell from becoming another cell type.

10 Sep 2010

Study suggests PTSD symptoms common in Second Generation population

In groups with high rates of posttraumatic stress disorder (PTSD), such as the survivors of the Nazi Death Camps, the adjustment problems of their children, the so called "Second Generation", have received attention by researchers. Studies suggested that some symptoms or personality traits associated with PTSD may be more common in the Second Generation than the general population.

9 Sep 2010

Further evidence on adverse effects of smoking on fertility

Two new studies have shed more light on how smoking may damage fertility, and give further weight to advice that mothers and fathers-to-be should stop smoking before attempting to conceive. The research is published online in the reproductive medicine journal Human Reproduction today (Wednesday 8 September).

8 Sep 2010

Ovatech completes Phase 2 study of Ovaprene non-hormonal, intravaginal contraceptive ring

Ovatech, an emerging women's health-focused company, announced today that the Company's Phase 2 clinical study of its non-hormonal, intravaginal contraceptive ring, Ovaprene, has been successfully completed. Ovaprene is a 'one-size-fits-all' patented, female-controlled, intravaginal organic silicone ring barrier-contraceptive that is designed to continuously release spermiostatic and spermicidal non-drug agents over a four-week period.

2 Sep 2010

Natural selection theory can explain evolution of eusocial behavior: Study

Scientists at Harvard University have sketched a new map of the "evolutionary labyrinth" species must traverse to reach eusociality, the rare but spectacularly successful social structure where individuals cooperate to raise offspring.

27 Aug 2010

Researchers identify molecular signals that impact male fertility: Research

Male infertility is a common medical problem, affecting millions of men in the United States annually. Its causes include an inability to make productive sperm. Now, using yeast as a model organism, researchers at the University of Pennsylvania School of Medicine are beginning to identify the molecular signals that could in part underlie that problem.

25 Aug 2010

Researchers discover unusual property of meiosis may lead to Down syndrome

In a study of egg cells using time-lapse microscopy, researchers at the University of California, San Diego School of Medicine and the Ludwig Institute for Cancer Research have discovered an unusual property of meiosis - cell division that produces reproductive cells in sexually reproducing organisms.

23 Aug 2010

Repros Therapeutics requests Type B Meeting to review Androxal Phase III protocols

Repros Therapeutics Inc. today announced that the Company has requested a Type B Meeting in order to review the Company's Phase III protocols for Androxal in the treatment of secondary hypogonadism. Androxal is an oral drug that normalizes both testosterone and sperm levels.

18 Aug 2010

Majority of women support single woman using IVF treatment to conceive, survey finds

A recent survey of American women aged 25-45 that gauged attitudes toward In Vitro Fertilization found that 83% of these women support a single woman using IVF to conceive if she is emotionally and financially able to care for the child.

16 Aug 2010

Involuntary childlessness affects couples more negatively than previously reported

Test-tube fertilisation is the reason why more couples than previously now have the chance to become biological parents. However, the path to achieving this can be laborious and, for some, the treatment is unsuccessful. A thesis from the University of Gothenburg, Sweden, indicates that people are more negatively affected than previously reported in studies of involuntary childlessness.

16 Aug 2010

Watson to launch ella emergency contraceptive in fourth-quarter 2010

Watson Pharmaceuticals, Inc., today announced that it intends to launch ella® (ulipristal acetate), a novel oral emergency contraceptive, in the fourth quarter of 2010. Watson's announcement follows the approval of ella® by the FDA as safe and effective in preventing unintended pregnancy for up to 120 hours – or five days – post-unprotected intercourse (UPI) or contraceptive failure.

16 Aug 2010

Repros receives US patent for Androxal

Repros Therapeutics Inc. today announced the US Patent and Trademark office has issued U.S. Patent No. 7,759,360 for Androxal, the Company's lead program for the treatment of low testosterone in men. This patent specifically claims methods and materials for the treatment of testosterone deficiency in men with secondary hypogonadism. Repros has over 35 issued or pending US and European patents involving Androxal.

11 Aug 2010

FDA approves longer Valcyte therapy for CMV disease in adult kidney transplant patients

Genentech, Inc., a member of the Roche Group, announced today that the U.S. Food and Drug Administration (FDA) approved increasing the length of therapy with Valcyte (valganciclovir hydrochloride) in adult kidney transplant patients at high risk for cytomegalovirus (CMV) disease.

11 Aug 2010

Healthy eggs require tremendous amount of zinc to reach maturity for fertilization: Research

Scientists as well as fertility doctors have long tried to figure out what makes a good egg that will produce a healthy embryo. It's a particularly critical question for fertility doctors deciding which eggs isolated from a woman will produce the best embryos and, ultimately, babies.New research reveals healthy eggs need a tremendous amount of zinc to reach maturity and be ready for fertilization,a finding that may ultimately help physicians assess the best eggs for fertility treatment, according to a study from Northwestern University.

10 Aug 2010

New familial link in juvenile myelomonocytic leukemia discovered

A UCSF-led team has discovered a direct link between an inherited genetic mutation, a set of developmental abnormalities and a rare form of childhood leukemia called juvenile myelomonocytic leukemia, or JMML. The study demonstrates a new familial link in JMML and has significant implications, the researchers say, for improving the diagnosis and treatment of the disease.

9 Aug 2010