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.

Microbiomes may have considerable impact on animal fertility and reproduction

It is an awkward idea, but a couple's ability to have kids may partly depend on who else is present. The reproductive tracts of males and females contain whole communities of micro-organisms.

17 Jan 2020

Research shows how the body tries to eliminate egg cells of poorest quality

A woman's supply of eggs is finite, so it is crucial that the quality of their genetic material is ensured. New work from Carnegie's Marla Tharp, Safia Malki, and Alex Bortvin elucidates a mechanism by which, even before birth, the body tries to eliminate egg cells of the poorest quality.

16 Jan 2020

Researchers discover how a new immune system works to protect bacteria from phages

Researchers at University of California San Diego School of Medicine have discovered how a new immune system works to protect bacteria from bacteriophages (phages), viruses that specifically infect bacteria.

11 Jan 2020

Study sheds new light on impact of common plasticizer on human reproductive health

Researchers at Harvard Medical School and the New York State Department of Health have discovered how a common plasticizer associated with human reproductive abnormalities likely does its damage at the molecular level.

10 Jan 2020

First-ever genomic analysis of puberty yields insights into critical areas of human health

In the first-ever genome-scale analysis of the puberty process in humans, researchers at Huntsman Cancer Institute at the University of Utah outline distinct and critical changes to stem cells in males during adolescence.

9 Jan 2020

New study finds zinc and folic acid supplements are ineffective at improving male fertility

A study has revealed that taking zinc and folic acid supplements do not improve male fertility as has previously been suspected.

8 Jan 2020

Zinc and folic acid supplements fail to improve fertility in men

Zinc and folic acid, a pair of dietary supplements long touted as an effective treatment for male infertility, failed to improve pregnancy rates, sperm counts, and sperm potency in a new study conducted at University of Utah Health and other medical centers in conjunction with the National Institutes of Health.

7 Jan 2020

Common plasticizer leads to fertility problems in roundworms

A new study published 9th January in PLOS Genetics by Mónica Colaiácovo of Harvard Medical School and colleagues reports that the most commonly used plasticizer, diethylhexyl phthalate, leads to fertility problems by causing an excess number of breaks in the DNA during egg production, and then interfering with the repair systems that fixes the breaks.

2 Jan 2020

Study reveals rapid effects of diet on sperm quality

Sperm are influenced by diet, and the effects arise rapidly. This is the conclusion of a study by researchers at Linköping University, in which healthy young men were fed a diet rich in sugar.

28 Dec 2019

Autism risk in children could be predicted by mutations in paternal sperm

Researchers from the University of California, San Diego, have found that mutations present in the sperms of the father could be predictors of autism in the offspring, in a landmark study. These mutations, if quantified could help ascertain the risk say the researchers. The new study appears this week in the latest issue of the journal Nature Medicine.

23 Dec 2019

National veteran dataset will help dissect the relationship between mental illness and prostate cancer

There appears to be an unhealthy synergy between mental illness and prostate cancer, and researchers are working to dissect the relationship by first assembling the largest dataset ever of veterans with either condition or both.

23 Dec 2019

Fewer fats could be the key to boosting male fertility

A diet low in fat and high in egg whites could be the key to boosting male fertility according to a new pilot study.

23 Dec 2019

Genetic mystery of infertility in fruit flies discovered

Researchers have discovered a novel parasitic gene in fruit flies that is responsible for destroying the eggs in the ovaries of their daughters.

17 Dec 2019

Penn researchers track defective sperm epigenome linked to male infertility

One out of eight couples has trouble conceiving, with nearly a quarter of those cases caused by unexplained male infertility. For the past decade, research has linked that infertility to defective sperm that fail to "evict" proteins called histones from DNA during development.

16 Dec 2019

Important discovery about male infertility could lead to new treatments

Using a new mouse model, Penn Medicine researchers have identified defects in the sperm epigenome that cause male infertility.

16 Dec 2019

Boys born small at higher risk of infertility

A new study published in the journal Human Reproduction on December 13, 2019, shows that baby boys who don’t grow as well as expected in the womb may grow up to be infertile as adults. The study showed a 55% or 85% higher risk of infertility among this group of men compared to those born with appropriate weights.

15 Dec 2019

UCLA scientists discover reason for higher rates of autoimmune disease in women than men

UCLA scientists have discovered one reason why autoimmune diseases are more prevalent in women than in men.

11 Dec 2019

Why some sperm swim in circles – it’s a protein defect

A new study published in the journal PNAS shows that some sperm cannot swim straight because they lack a protein called VSP. This motility defect seriously impacts the rates of successful fertilization. In addition, VSP is also found to regulate the amount of calcium that enters the flagellum, the whiplike organelle that propels the sperm towards the waiting ovum or egg. This important discovery may help treat infertility more effectively.

3 Dec 2019

New project could mark a pivotal advancement in therapies to address male sterility

Researchers from the University of Georgia, Emory University School of Medicine and the University of Pittsburgh have received a $2.9 million grant from the National Institutes of Health to test a novel method of producing viable sperm cells from skin cells.

3 Dec 2019

Smoking cannabis increases testicular cancer risk

Men who regularly smoke cannabis increase their risk of developing testicular cancer, according to a new study published in the Journal of the American Medical Association (JAMA).

2 Dec 2019