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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.
MES announces global release of two new semen analysis products

MES announces global release of two new semen analysis products

Medical Electronic Systems today announced the worldwide release of two new products to supplement its full line of Automated and Manual semen analysis solutions. [More]
Huntington's disease monkey model embodies full array of symptoms similar to human patients

Huntington's disease monkey model embodies full array of symptoms similar to human patients

Transgenic Huntington's disease monkeys display a full spectrum of symptoms resembling the human disease, ranging from motor problems and neurodegeneration to emotional dysregulation and immune system changes, scientists at Yerkes National Primate Research Center, Emory University report. [More]
UCLA urologist debunks 5 common myths about vasectomies

UCLA urologist debunks 5 common myths about vasectomies

Men can be very concerned about what happens during, and after, a vasectomy - specifically how it will affect them personally. Dr. Jesse Mills, a clinical professor of urology and director of The Men's Clinic at UCLA, says the many myths surrounding the procedure can make men rethink what is often a smart choice for them. [More]
Scientists discover network of flows that distribute messenger substances in the brain

Scientists discover network of flows that distribute messenger substances in the brain

We have all bumped our heads at some point, and such incidents are usually harmless. This is thanks to fluid-filled chambers in our brain that offset minor knocks and jolts and provide padding for sensitive components of our nervous system. [More]
QUT study finds age and education may influence women in selecting sperm donors

QUT study finds age and education may influence women in selecting sperm donors

With commercial sperm banking giving women more opportunities to become mothers, a world-first QUT study has found the age and education of sperm donors are the most important characteristics considered. [More]
Prenatal butylparaben exposure causes various endocrine disrupting effects in rats

Prenatal butylparaben exposure causes various endocrine disrupting effects in rats

Research suggests that butylparaben - which is used in cosmetics and skin care products such as sunscreen - have more endocrine disrupting effects than previously thought. [More]
Immobilisation after intrauterine insemination has no beneficial effect on pregnancy rates in women

Immobilisation after intrauterine insemination has no beneficial effect on pregnancy rates in women

Despite the positive results of small studies and a widely held belief in its benefit, the practice of keeping female patients immobilised after intrauterine insemination has no beneficial effect on pregnancy rates, according to results of a large randomised study presented here at the Annual Meeting of ESHRE in Helsinki. [More]
Early detection, treatment key to testicular cancer cure

Early detection, treatment key to testicular cancer cure

When women feel a lump in their breast, they usually seek medical attention within a few weeks. Yet men who notice something abnormal in a testicle typically don't see a doctor for two to three months. [More]
Testosterone therapy improves sexual activity in older men

Testosterone therapy improves sexual activity in older men

Older men with low libido and low testosterone levels showed more interest in sex and engaged in more sexual activity when they underwent testosterone therapy, according to a new study published in the Endocrine Society's Journal of Clinical Endocrinology & Metabolism. [More]
Math professor develops scientific model to report ways Zika virus proliferates

Math professor develops scientific model to report ways Zika virus proliferates

A University of Miami math professor has developed a scientific model to address the various ways the Zika virus proliferates. The study, published June 17, 2016 in Scientific Reports, reveals that mosquito control should remain the most important mitigation method to control the virus. [More]
Positive environment can reverse trauma-related behavioral alterations in mice

Positive environment can reverse trauma-related behavioral alterations in mice

Traumatic experiences in childhood increase the risk of developing behavioral and psychiatric disorders later in life. It is also known that the consequences of a trauma can likewise be observed in the children of people affected even if those children have themselves not experienced any trauma. [More]
Mice study shows influence of dad's obesity on daughter’s body weight and breast cancer risk

Mice study shows influence of dad's obesity on daughter’s body weight and breast cancer risk

Obese male mice and normal weight female mice produce female pups that are overweight at birth through childhood, and have delayed development of their breast tissue as well as increased rates of breast cancer. [More]
Sperm of smokers has greater extent of DNA damage than that of non-smokers

Sperm of smokers has greater extent of DNA damage than that of non-smokers

A recent study found that that sperm of men who smoke has a greater extent of DNA damage than that of non-smokers. [More]
Researcher aims to develop easy-to-use, inexpensive sperm sorting devices to help infertile couples

Researcher aims to develop easy-to-use, inexpensive sperm sorting devices to help infertile couples

The competition is fierce and only the strongest survive the obstacle course within the female reproductive tract. Of the millions of sperm that enter the vagina, only about 10 or so make it to the oocyte or egg, demonstrating how rigorous the natural sperm selection process really is. [More]
ISSCR releases updated guidelines for stem cell research, development of new therapies

ISSCR releases updated guidelines for stem cell research, development of new therapies

The International Society for Stem Cell Research, the world's largest professional organization of stem cell scientists, today released newly updated guidelines for stem cell research and the development of new clinical therapies. [More]
Key gene changes reveal four previously unknown conditions within schizophrenia

Key gene changes reveal four previously unknown conditions within schizophrenia

Changes in key genes clearly define four previously unknown conditions within the umbrella diagnosis of schizophrenia, according to a study led by researchers from NYU Langone Medical Center published online April 28 in EBioMedicine, a Lancet journal. Cases associated with changes in each of the four genes were different from each other in terms of symptoms, intelligence level and other disease features. [More]
Effects of BPA on embryos in females undergoing IVF

Effects of BPA on embryos in females undergoing IVF

Bisphenol A (BPA) is an industrial chemical that is used in a variety of consumer products, such as water bottles, metal food and beverage containers, and thermal paper cash register receipts. [More]
Modernization of screening methods in sperm banks could protect future children from highly heritable diseases

Modernization of screening methods in sperm banks could protect future children from highly heritable diseases

U.S. sperm banks perform genetic testing to screen for and disqualify carriers of a limited number of recessive disease mutations, but more comprehensive and affordable DNA-based screening methods are now available that can detect many more disease-causing genetic variations. [More]
New national database could help identify major influences on miscarriage

New national database could help identify major influences on miscarriage

A new national database could help relieve the misery of miscarriage for thousands of women. [More]
Zinc sparks help doctors choose best eggs to transfer during IVF

Zinc sparks help doctors choose best eggs to transfer during IVF

A stunning explosion of zinc fireworks occurs when a human egg is activated by a sperm enzyme, and the size of these "sparks" is a direct measure of the quality of the egg and its ability to develop into an embryo, according to new research from Northwestern Medicine. [More]
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