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.

Vitrolife, ParentPlus enter collaboration to develop new products for IUI

Vitrolife is entering into a collaboration agreement with ParentPlus LLC, with the aim of developing new products for IUI (Intra-Uterine Insemination, artificial insemination).

11 Nov 2011

Survey shows low awareness for non-surgical permanent birth control methods

A recent first-of-its-kind survey of 1,006 mothers in the U.S. showed that more than 75 percent of women reported being done having children, but only 24 percent discussed this decision with their OB/GYNs.

8 Nov 2011

Researchers discover key enzymes that are critical for sperm function

Compared to most other cells in an organism, sperm undergo a radical transformation to become compact and mobile delivery systems for paternal DNA. Even though sperm looks and moves quite differently across species, SF State researcher Diana Chu and colleagues now say that there are at least a few key enzymes that are critical for sperm development and mobility in species as different as mice and nematode worms.

2 Nov 2011

Fertility chip can accurately count sperm and measure their motility

Loes Segerink, a researcher at the University of Twente has developed a "fertility chip" that can accurately count sperm and measure their motility. The chip can be inserted into a compact device for one-off use.

29 Oct 2011

Longer looks: Looking for the inventor of the individual mandate, Miss. abortion referendum may have wider effects

In the course of defending the health care bill he passed in Massachusetts, Mitt Romney told Newt Gingrich that he got the idea for the individual mandate -- a rule dictating that everyone must buy health insurance or pay a penalty -- from the Heritage Foundation, a conservative Washington, D.C. think tank. Is it really responsible for creating the policy that is now so anathema to conservatives?

28 Oct 2011

FSU biologists devise new way to watch how cells move

For better and for worse, human health depends on a cell's motility -- the ability to crawl from place to place. In every human body, millions of cells -are crawling around doing mostly good deeds --- though if any of those crawlers are cancerous, watch out.

19 Oct 2011

ESCs express genes linked with early germ cell specification

Ordinarily, embryonic stem cells exist only a day or two as they begin the formation of the embryo itself. Then they are gone. In the laboratory dish, however, they act more like perpetual stem cells - renewing themselves and exhibiting the ability to form cells of almost any type, a status called totipotency.

14 Oct 2011

Novel link between cell surface sugars, Darwinian sexual selection, and immune function

Researchers at the University of California, San Diego School of Medicine say that losing the ability to make a particular kind of sugar molecule boosted disease protection in early hominids, and may have directed the evolutionary emergence of our ancestors, the genus Homo.

11 Oct 2011

Researchers identify unusual genomic architecture linked with very severe forms of disease

When cells divide normally, DNA gets copied perfectly and distributed among the daughter cells with an even hand. Occasionally though, DNA breaks during division and is rearranged, resulting in duplications or deletions of important parts of the blueprint.

3 Oct 2011

BPA may not affect male testes

Bisphenol A (BPA), a common component of plastic used in many consumer products, has recently become infamous -- and banned in some places -- because it can mimic natural estrogen in the body. A new study by Brown University toxicologists, however, finds that male mice whose mothers were exposed even to high doses of BPA while pregnant developed no signs of harm to their testes as adults.

23 Sep 2011

Study examines long-term use of Standard Days Method among women

A simple-to-use, fertility-awareness based method of family planning developed by researchers from the Institute for Reproductive Health at Georgetown University Medical Center so effectively meets the needs of users that they continue to rely on it for years.

21 Sep 2011

Sperm bank spurns potential redhead donors

Cryos International, one of the world's largest sperm banks is refusing potential donors who have red hair. The bank's director told the Danish newspaper Ekstrabladet that there simply wasn't much demand for sperm from red-headed men.

20 Sep 2011

LA BioMed andrologist leads new male contraceptive Phase I clinical study

Christina Wang, M.D., lead investigator at Los Angeles Biomedical Research Institute (LA BioMed) - one of the leading biomedical research institutes in the country - is currently working on a Phase I single dose and multiple dose study that tests the safety and tolerability of a new androgen dimethandrolone undecanoate that is being developed as a potential male contraceptive agent.

20 Sep 2011

IUDs may protect from cervical cancer

According to the results of an international study, coil contraceptive devices might protect women against developing cervical cancer even though they don't stop the infection that commonly leads to the disease.

14 Sep 2011

Cook Medical introduces Otrieva Tapered Ovum Aspiration Needle

A new needle for ovum collection is now available to reproductive endocrinologists and embryologists: the Otrieva Tapered Ovum Aspiration Needle, which Cook Medical launches today. The Otrieva needle features a tapering process that results in a consistent bevel designed to allow precise ovum collection and less pain and bleeding during aspiration, as clinical studies of similar devices have demonstrated.

12 Sep 2011

Mayo Clinic develops genome-based immunization strategy against feline AIDS

Mayo Clinic researchers have developed a genome-based immunization strategy to fight feline AIDS and illuminate ways to combat human HIV/AIDS and other diseases. The goal is to create cats with intrinsic immunity to the feline AIDS virus. The findings -- called fascinating and landmark by one reviewer -- appear in the current online issue of Nature Methods.

12 Sep 2011

Researchers discover new genetic defect that can lead to Leigh syndrome

In Leigh syndrome, infants are born apparently healthy only to develop movement and breathing disorders that worsen over time, often leading to death by the age of 3. The problem is that the mitochondria responsible for powering their cells can't keep up with the demand for energy in their developing brains.

7 Sep 2011

Sperm donors may father over 150 children

Most sperm donors assume that they would father a few children. But with the news that some donors have fathered over 100 kids there have been calls for tighter regulation. It has been discovered that some sperm banks allow donors to father lots and lots of kids — one has over 150. And with these very large groups of half-siblings come risks: rare genetic conditions could be spread more widely through the gene pool, and children of the same donor could meet and, unbeknownst to them, commit incest.

6 Sep 2011

First Edition: September 6, 2011

Today's early morning highlights from the major news organizations include reports from a GOP presidential candidate forum in South Carolina and analysis of what to expect as Congress returns to Washington.

6 Sep 2011

Biologists reveal why men's ring fingers are longer than their index fingers

Biologists at the University of Florida have found a reason why men's ring fingers are generally longer than their index fingers - and why the reverse usually holds true for women.

6 Sep 2011