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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.
BetterYou magnesium can raise cellular mineral levels faster than traditional tablets

BetterYou magnesium can raise cellular mineral levels faster than traditional tablets

Low magnesium levels are leading to a worrying level of undissolved calcium and increased heavy metal toxicity which can severely impact on our health and wellbeing, say mineral analysis experts. [More]
Harvard scientists discuss promise and peril of emerging IVG technique

Harvard scientists discuss promise and peril of emerging IVG technique

In vitro fertilization has transformed reproductive medicine and sparked a number of therapeutic and diagnostic breakthroughs. [More]
Researchers examine extent and severity of genitourinary injuries among U.S. service members

Researchers examine extent and severity of genitourinary injuries among U.S. service members

Because battlefield medical care has improved throughout the Iraq and Afghanistan wars, many more U.S. servicemen have survived what could have been fatal injuries in the past. [More]
Parental obesity may increase children's risk for developmental delays, NIH study suggests

Parental obesity may increase children's risk for developmental delays, NIH study suggests

Children of obese parents may be at risk for developmental delays, according to a study by researchers at the National Institutes of Health. [More]
New active pharmaceutical ingredient may help against severe forms of testicular cancer

New active pharmaceutical ingredient may help against severe forms of testicular cancer

A new active pharmaceutical ingredient may help against severe forms of testicular cancer, which only respond inadequately to other therapies. [More]
Myc genes play key role in self-renewal of spermatogonial stem cells

Myc genes play key role in self-renewal of spermatogonial stem cells

Sperm are constantly replenished in the adult male body. Understanding the workings of stem cells responsible for this replenishment is expected to shed light on why male fertility diminishes with age, and possibly lead to new treatments for infertility. [More]
High BMI leads to epigenetic changes, study shows

High BMI leads to epigenetic changes, study shows

The extra pounds you gain during the holidays will not only show up on your hips but will also affect your DNA. [More]
Fly study shows RNA pathway plays major role in normal health and longevity

Fly study shows RNA pathway plays major role in normal health and longevity

Humans and other animals carry rogue sequences of DNA in their genomes called transposable elements. To prevent passing TEs to their offspring, they employ the piRNA pathway in their reproductive organs to block the elements from being active in their sperm and eggs. [More]
Factors that impact fertility in men

Factors that impact fertility in men

Starting a family can be a stressful process, and there are things that can affect your plans that you may not have considered. According to the Centers for Disease Control and Prevention (CDC), an estimated 18 percent of men who sought help with a fertility specialist were diagnosed with a male-related infertility. [More]
Scientists uncover changes in immediate environment of DNA after fertilization

Scientists uncover changes in immediate environment of DNA after fertilization

A team of scientists at the Helmholtz Zentrum München shows changes in the immediate environment of DNA after the ovum and sperm fuse to form the zygote. The results suggest why all conceivable somatic cells can develop from the germ cells. The study has been published in the journal 'Genes and Development'. [More]
Sperm tail enzymes inspire nanobiotechnology

Sperm tail enzymes inspire nanobiotechnology

Just like workers in a factory, enzymes can create a final product more efficiently if they are stuck together in one place and pass the raw material from enzyme to enzyme, assembly line-style. [More]
Scientists discover unique genomic changes integral to testicular cancer development

Scientists discover unique genomic changes integral to testicular cancer development

Researchers led by scientists at Dana-Farber Cancer Institute say they have identified unique genomic changes that may be integral to testicular cancer development and explain why the great majority are highly curable with chemotherapy - unlike most solid tumors. [More]
Prohibiting anonymous sperm donation could lead to decline in number of donors, study suggests

Prohibiting anonymous sperm donation could lead to decline in number of donors, study suggests

A new study published in the Journal of Law and the Biosciences suggests that prohibiting anonymous sperm donation would result in a decline in the number of donors, and that those willing to donate would likely demand compensation for donation. [More]
Editing preferences of enzymes may play role in infertility and cancer

Editing preferences of enzymes may play role in infertility and cancer

To "turn off" particular regions of genes or protect them from damage, DNA strands can wrap around small proteins, called histones, keeping out all but the most specialized molecular machinery. [More]
Men lack knowledge about risk factors contributing to male infertility, study finds

Men lack knowledge about risk factors contributing to male infertility, study finds

The first large-scale study of its kind has revealed that Canadian men generally lack knowledge about the risk factors contributing to male infertility. [More]
Men have positive attitude towards new male contraceptive, study finds

Men have positive attitude towards new male contraceptive, study finds

A new study has found that men have positive attitudes towards an innovative male contraceptive, Vasalgel. The landmark study, published in Cogent Medicine, is the first insight into how men perceive the new contraceptive and gives promising signs that Vasalgel may revolutionise approaches to reproductive health. [More]
Zika virus infection can break down and damage testes of male mice, new research shows

Zika virus infection can break down and damage testes of male mice, new research shows

New research in male mice has revealed that Zika virus infection can break down and severely damage the animals' testes. [More]
New sperm research could lead to better infertility treatment decisions

New sperm research could lead to better infertility treatment decisions

Sperm and mathematics don't appear to be the likeliest of bedfellows - but new research bringing the two together could lead to devices that could cut infertility rates. [More]
Men can take contraceptives to prevent pregnancy in female partners, study shows

Men can take contraceptives to prevent pregnancy in female partners, study shows

Men can take birth control shots to prevent pregnancy in their female partners, according to a new study published in the Endocrine Society's Journal of Clinical Endocrinology & Metabolism. [More]
Kent State scientists receive new NIH grants for reproductive biology research

Kent State scientists receive new NIH grants for reproductive biology research

It could be argued that no science is more valuable to us than that which helps to ensure the survival of our species by solving the problems that challenge it. [More]
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