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Current Sperm News and Events, Sperm News Articles.
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Long duration of sperm freezing makes no difference to live birth rates in large sperm bank study
Despite a time limit imposed in many countries on the freeze-storage of sperm, a new study from China has found that the long-term cryopreservation of semen in a sperm bank does not affect future clinical outcomes. Results of the study are presented today in Vienna at the 35th Annual Meeting of ESHRE by Dr Chuan Huang of the Changsa-Hunan Sperm Bank in China. (2019-06-24)

Frozen sperm retains its viability in outer space conditions
Zillionaires like Amazon founder Jeff Bezos who see the 'colonization' of space as an answer to the Earth's ever threatened resources will be reassured to learn that human sperm retains its complete viability within the different gravitational conditions found in outer space. (2019-06-23)

B chromosome first -- mechanisms behind the drive of B chromosomes uncovered
B chromosomes are supernumerary chromosomes, which often are preferentially inherited and showcase an increased transmission rate. This transmission advantage is known as 'chromosome drive'. Scientists from the IPK in Gatersleben have now deciphered the mechanisms behind the drive of B chromosomes in Aegilops speltoides. (2019-06-20)

Genetic inequity towards endocrine disruptors
Phthalates are used by industry in plastic products. Their toxic effect on the endocrine system is worrying. Indeed, the exposure of male foetuses to phthalates can have devastating consequences for the fertility. However, researchers (UNIGE/HUG) show that phthalate susceptibility depends largely on the genetic heritage of each individual. These results raise the question of individual vulnerability and the possible transmission to future generations of epigenetic changes that should normally be erased during foetal development. (2019-06-13)

Marijuana and fertility: Five things to know
For patients who smoke marijuana and their physicians, 'Five things to know about ... marijuana and fertility' provides useful information for people who may want to conceive. The practice article is published in CMAJ (Canadian Medical Association Journal). (2019-06-10)

New technique will help experts make heads or tails of male fertility
A new way of analyzing sperm that tracks the movement of the sperm tail could enable substantial improvements to male fertility testing. (2019-06-06)

No increased risk of birth defects in children of fathers treated for testicular cancer
New research has found no increased risk of congenital malformations associated with treatment with radiotherapy or chemotherapy in children of fathers with testicular cancer. The study, by Yahia Al-Jebari of Lund University, Sweden and colleagues, is published in the open-access journal PLOS Medicine on June 4, 2019. It followed 4,207 children of 2,380 fathers and finds that those conceived after treatment were not at a greater risk of congenital malformations than those conceived before. (2019-06-04)

Changes to immune genes link paternal smoking with childhood asthma
New research shows that children exposed to paternal tobacco smoking before birth are more likely to develop asthma - and that associated changes to immune genes predict the level of risk. Published in Frontiers in Genetics to coincide with the WHO's World No Tobacco Day, the study reinforces the risks of either parent smoking -- and according to the authors, could provide DNA targets for the early prediction and reversal of tobacco smoking-associated childhood asthma. (2019-05-31)

Stress during early pregnancy is linked to reduced reproductive function in male offspring
Men whose mothers were exposed to stressful life events while they were in the first 18 weeks of pregnancy may have reduced sperm counts when they become adults, according to a study published in Human Reproduction, one of the world's leading reproductive medicine journals. (2019-05-29)

Experimental fertility preservation provides hope for young men
Testicular tissue samples obtained from 189 males who were facing procedures that could imperil fertility were cryopreserved at one university, proving the feasibility of centralized processing and freezing of testicular tissue obtained from academic medical centers, including Children's National, scattered around the world. (2019-05-23)

Older male crickets attract more females -- but have less sex
Older male crickets are better at getting females to live with them -- but they mate less than younger rivals once they find a partner. (2019-05-23)

Poor semen quality in Switzerland
A marked decrease in sperm count has been observed. And in Switzerland? Researchers (UNIGE) have undertaken the first nationwide assessment of the semen quality. The scientists assessed the number of spermatozoa, their motility and morphology. The results were well below the reference values issued by the WHO. The current situation is a matter of concern since the poor semen quality of Swiss men is associated with an increase in the incidence of testicular cancer. (2019-05-22)

Sex sells: how masculinity is used as currency to buy sperm donors' time
Sperm banks in the United Kingdom and Australia use images and phrases associated with masculinity to attract donors because laws prohibit them from paying for sperm. (2019-05-20)

Men ignore serious health risks of steroid abuse in pursuit of the body beautiful
Many men continue to abuse steroids despite knowing that they have serious, life-limiting and potentially lethal side effects, according to findings to be presented in Lyon, at the European Society of Endocrinology annual meeting, ECE 2019. (2019-05-18)

Older fathers put health of partners, unborn children at risk, Rutgers study finds
Men who delay starting a family have a ticking 'biological clock' -- just like women -- that may affect the health of their partners and children, according to Rutgers researchers. (2019-05-12)

Female flies respond to sensation of sex, not just sperm
Female fruit flies will temporarily reject other partners after mating, thanks to special proteins in a male fly's ejaculate. New research shows that the feeling of sex, even without sperm, can trigger the same response. (2019-05-06)

The immaculate conception?
A new, groundbreaking study by the Hebrew University of Jerusalem (HU) found a way to transform skin cells into the three major stem cell types that comprise early-stage embryos. This work has significant implications for modelling embryonic disease and placental dysfunctions, as well as paving the way to create whole embryos from skin cells. (2019-05-02)

An important function of non-nucleated sperm
Some animals form characteristic infertile spermatozoa called parasperm, which differ in size and shape compared to fertile sperm produced by single males. A research team at the National Institute for Basic Biology in Japan has identified the gene involved in the formation of the apyrene sperm and has revealed the important function of the apyrene sperm in fertilization using the silk moth. (2019-04-29)

Short period of parental sexual contact prior to pregnancy increases offspring risk of schizophrenia
Mount Sinai study may help explain some of the excess risks for inflammatory diseases in first born children. (2019-04-23)

Glowing millipede genitalia help scientists tell species apart
Researchers studying near-identical species of millipedes found a new way to tell them apart: shining a blacklight on them. Under the UV light, parts of the different species' genitals will glow different colors. This discovery has allowed scientists to rewrite this part of the millipede family tree. (2019-04-18)

The FASEB Journal: DNA repair gene linked to male infertility
A key DNA repair gene known as X-ray repair cross-complementing group 1, or XRCC1, plays a vital role in maintaining genomic stability and is highly expressed in the early stages of sperm cell development (also known as spermatogenesis). To date, however, the exact mechanisms of XRCC1 have been unclear. (2019-04-18)

Could climate change cause infertility?
A number of plant and animal species could find it increasingly difficult to reproduce if climate change worsens and global temperatures become more extreme -- a stark warning highlighted by new scientific research. (2019-04-15)

Entomologists uncover Florida fire ant matriarchy
Researchers at the University of Georgia have found colonies of tropical fire ants, native to Florida and coastal Georgia, that thrive with multiple queens and in close proximity to single-queen colonies of the same species. (2019-04-15)

Transgender youth faced with tough decision to freeze sperm or eggs
Transitioning transgender adolescents are forced to consider whether or not they pursue fertility preservation. Their decision is influenced by certain key factors, reports a new study. (2019-04-15)

Showy primates have smaller testicles
Well-adorned or well-endowed -- but not both. Evolutionary biologists at the University of Zurich have for the first time demonstrated that male primates either have large testicles or showy ornaments. Developing both at the same time may simply take too much energy. (2019-04-09)

Screw-shaped bird sperm swim faster -- but it comes at a cost
New research from the Natural History Museum in Oslo suggests that bird sperm cells with a spiral or screw-like shape swim faster than straighter sperm -- but that the spiral shape also makes them more fragile. (2019-04-04)

Infertility's roots in DNA packaging
Japanese researchers find one cause of infertility is the incomplete development of the proteins packaging DNA in sperm cells. (2019-03-26)

Second potential male birth control pill passes human safety tests
A new male birth control pill passed tests of safety and tolerability when healthy men used it daily for a month, and it produced hormone responses consistent with effective contraception, according to researchers at two institutions testing the drug. The phase 1 study results was presented Sunday, March 24, at ENDO 2019, the Endocrine Society's annual meeting in New Orleans, La. (2019-03-25)

Recovery from sperm suppression due to performance-enhancing drug abuse is slow
Decreased sperm and testosterone production caused by abuse of performing-enhancing hormones may be fully reversible once men stop taking the drugs, but full recovery can take at least nine to 18 months, according to research to be presented Sunday, March 24 at ENDO 2019, the Endocrine Society's annual meeting in New Orleans, La. (2019-03-25)

Particulate air pollution linked with reduced sperm production in mice
Exposure to tiny air pollution particles may lead to reduced sperm production, suggests new research in mice to be presented Monday, March 25, at ENDO 2019, the Endocrine Society's annual meeting in New Orleans, La. (2019-03-24)

Sperm DNA damage may contribute to repeat miscarriages
Some cases of recurrent pregnancy loss may be caused by sperm DNA damage in the male partner, rather than by a problem in affected women, according to research to be presented Sunday, March 24 at ENDO 2019, the Endocrine Society's annual meeting in New Orleans, La. (2019-03-23)

Researchers restore fertility in non-human primate model of childhood cancer survivorship
In a first, researchers at the University of Pittsburgh School of Medicine and the Magee-Womens Research Institute have reported in a non-human primate model that immature testicular tissue can be cryopreserved, and later be used to restore fertility to the same animal. (2019-03-21)

New study shows effects on offspring of epigenetic inheritance via sperm
As an organism grows and responds to its environment, genes in its cells are constantly turning on and off, with different patterns of gene expression in different cells. But can changes in gene expression be passed on from parents to their children and subsequent generations? Researchers at UC Santa Cruz have now demonstrated that epigenetic information carried by parental sperm chromosomes can cause changes in gene expression and development in the offspring. (2019-03-20)

Mathematicians reveal secret to human sperm's swimming prowess
Researchers, from the universities of York and Oxford, have discovered that a reinforcing outer-layer which coats the tails of human sperm is what gives them the strength to make the powerful rhythmic strokes needed to break through the cervical mucus barrier. (2019-03-19)

World's oldest semen still viable
Ram semen stored at the University of Sydney for 50 years has been used to successfully impregnate 34 ewes, with fertility rates as high as recently stored semen. (2019-03-17)

DNA of sperm taken from testicles of infertile men 'as good as sperm from fertile men'
Scientists have found that sperm DNA from the testicles of many infertile men is as good as that of ejaculated sperm of fertile men. This may explain a major cause of male infertility and opens the possibility of using sperm taken directly from the testicles of these men; to overcome their infertility. (2019-03-16)

Mysterious males: Asexual female nematodes produce males for sperm, not genes
Getting at why nematodes engaged in a unique female-favoring reproduction strategy produce males at all, researchers report that the asexual females produce limited numbers of male offspring to exploit them for their sperm in order to make more males, and in a ratio meaning the resultant sons are more likely to mate with their sisters. (2019-03-14)

In this nematode species males are needed for reproduction but not their genes
In the Mesorhabditis belari roundworm, the sole purpose of males is to help females produce clones of themselves. This unique form of reproduction was recently described by researchers from the CNRS, l'ENS de Lyon, l'Université Claude Bernard Lyon 1, and the Muséum national d'Histoire naturelle in an article published on March 15, 2019, in the journal Science. (2019-03-14)

Chemical pollutants in the home degrade fertility in both men and dogs, study finds
New research by scientists at the University of Nottingham suggests that environmental contaminants found in the home and diet have the same adverse effects on male fertility in both humans and in domestic dogs. (2019-03-04)

Let the sperm races begin
For best chances of in vitro fertilization success, the most motile sperm are chosen from semen. But current methods of sperm selection are inefficient and can cause fragmentation of the precious DNA carried in sperm heads. Afrouz Ataei has developed an alternative mechanism to sort sperm, which avoids genetic damage while also being faster and more cost-effective. Ataei will describe the device at the 2019 APS March Meeting in Boston. (2019-03-04)

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