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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.
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]
Episona unveils first innovative new male fertility test at ASRM 2016

Episona unveils first innovative new male fertility test at ASRM 2016

Episona Inc., an epigenetics data company focused on improving outcomes in reproductive health, announced today the launch of Seed, an innovative new male fertility test, at the American Society for Reproductive Medicine Scientific Congress& Expo. [More]
Network of proteins linked to cancer may play vital role in male fertility

Network of proteins linked to cancer may play vital role in male fertility

Researchers studying reproductive science identified a network of proteins often linked to cancer as also important to male fertility and the birth of healthy offspring, according to a study in the Oct. 18 online issue of Cell Reports. [More]
Babies born to older women from assisted reproduction have fewer birth defects, research finds

Babies born to older women from assisted reproduction have fewer birth defects, research finds

Babies born to women aged 40 and over from assisted reproduction have fewer birth defects compared with those from women who conceive naturally at the same age, according to new research from the University of Adelaide. [More]

Researchers develop new technique that measures speed of rotating semen

The maths of collective behaviour has provided a new technique for selecting the best semen for artificial insemination in livestock. [More]
Researchers confirm long persistence of Zika virus in semen and reveal its presence within spermatozoa

Researchers confirm long persistence of Zika virus in semen and reveal its presence within spermatozoa

Recent work has shown that Zika virus persists in semen for up to 6 months after infection. In a correspondence published in The Lancet Infectious Diseases, the researchers, in addition to confirming its long persistence in semen (in this case for more than 130 days, i.e., over 4 months), reveal the presence of the virus even within spermatozoa. [More]
Scientists develop new method to produce embryos from non-egg cells

Scientists develop new method to produce embryos from non-egg cells

Scientists have shown for the first time that embryos can be made from non-egg cells, a discovery that challenges two centuries of received wisdom. [More]
Smoking fathers contribute to greater risk of early-onset asthma in offspring

Smoking fathers contribute to greater risk of early-onset asthma in offspring

A Norwegian study shows that asthma is three times more common in those who had a fAnchorather who smoked in adolescence than offspring who didn't. [More]
Researchers link RHOX gene mutations to infertility in men

Researchers link RHOX gene mutations to infertility in men

The underlying cause of male infertility is unknown for 30 percent of cases. In a pair of new studies, researchers at University of California San Diego School of Medicine determined that the reproductive homeobox (RHOX) family of transcription factors — regulatory proteins that activate some genes and inactivate others — drive the development of stem cells in the testes in mice. [More]
Endogenous cannabinoid plays crucial role in activating spermatozoa for fertilization

Endogenous cannabinoid plays crucial role in activating spermatozoa for fertilization

During fertilization, a sperm must first fuse with the plasma membrane and then penetrate the female egg in order to penetrate it. [More]
Developmental exposure to fracking chemicals may pose threat to fertility

Developmental exposure to fracking chemicals may pose threat to fertility

More than 15 million Americans live within a one-mile radius of unconventional oil and gas operations. UOGs combine directional drilling and hydraulic fracturing, or "fracking," to release natural gas from underground rock. [More]
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