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Lord of the flies: competition breeds a better ejaculate

August 20, 2019

When more rivals are around, they create and add extra protein to their seminal fluid making it extra…
Competition leads to fathers who produce more male sperm

July 3, 2019

New research led by The University of Western Australia has shown that the social conditions that a male…
New study challenges claim that exogenous RNA is essential for sperm function

July 3, 2019

Scientists from the University of Bath are challenging the claims of two high profile papers from 2018 which…
Pregnancy stress linked to lower sperm count in male offspring

May 30, 2019

Men whose mothers were exposed to stressful life events during the first 18 weeks of pregnancy may have…
Yuki Okada. Image credit: Takuma Imamura via University of Tokyo
Turns out DNA isn’t the only genetic material — Elucidating the mechanism of inheritance through through sperm

May 24, 2019

We now know living organisms’ gametes aren’t the exclusive vehicles of DNA. “It was said that DNA is…
Single molecule puts sperm on track

May 6, 2019

Sperm start their sprint to the ovum when they detect changes in the environment through a series of…
Scientists uncover mysteries of the powerful movement of the human sperm

March 25, 2019

Sperm is an incredibly good swimmer for its size. It needs quite a bit of strength to break…
How Men Continually Produce Sperm — and How that Discovery Could Help Treat Infertility

February 6, 2019

The production of sperm — otherwise known as spermatogenesis — generates more than 1,000 sperm per second in…
Research on sperm transportation reveals new cause of male infertility

January 18, 2019

About 9 percent of men and nearly 11 percent of women of reproductive age in the United States…
Cilia beat to an unexpected rhythm in male reproductive tract, study in mice reveals

January 15, 2019

Waves of undulating cilia drive several processes essential to life. They clear debris and mucus from the respiratory…
How sperm find their way

November 27, 2018

Researchers have found that a protein in the cell membranes of sperm plays a key role in how…
Female guppy fish choose sperm from preferred males

October 4, 2018

Researchers from The University of Western Australia have found that female guppy fish are highly selective when it…
Egg cell seeks sperm

October 2, 2018

Through clever partner selection, animals can increase the future success of their offspring. With some species, this process…
Japanese Researchers Create Human Eggs from Blood-Derived Stem Cells

September 24, 2018

Scientists have been working on making eggs and sperm from stem cells for a long time, and it…
How does a sperm meet an egg?

August 31, 2018

What kind of research do you think is being carried out at the Misaki Marine Biological Station? Fish…
What Makes a Good Egg?

February 6, 2018

In approximately 15 percent of cases where couples are unable to conceive, the underlying cause of infertility is…
Rival sperm and choosy eggs: when sperm compete, eggs have a choice

November 10, 2017

The delicately mannered dance between discerning eggs and vying sperm is more complicated than scientists once believed, and…
Device provides scientists with clearest view of sperm’s motion in 3-D

September 14, 2017

Scientists have been able to observe sperm cells since the invention of the optical microscope. But capturing their…
More functional DNA in mitochondria cures male infertility

August 7, 2017

Male infertility can be caused by mutations in the DNA of mitochondria, the powerhouses of cells. By increasing…
Mutation speeds up sperm of zebra finches

July 18, 2017

In zebra finches, sperm velocity and morphology and hence reproductive success strongly depend on a specific mutation (an…
Longer-lived sperm produce healthier offspring

July 12, 2017

Research shows that selecting for longer-lived sperm within the ejaculate of a male results in offspring with better…
Poor diet ‘reprograms’ male sperm to produce smaller offspring

April 14, 2017

Researchers from The University of Western Australia have found that a change in a male’s diet can have…
Transport of molecular motors into cilia

March 28, 2017

Molecular motors produce the force that powers the beat of sperm cell tails to generate movement toward the…
Researchers describe how sperm can lose their way

February 27, 2017

Sperm tails are actually complex propellant and navigational devices that help push them through fluids and navigate around…
Out of gas and low on sperm?

December 28, 2016

Kyoto University uncovers a genetic key to self-renewal of reproductive cells Sperm are constantly replenished in the adult…
Fast, efficient sperm tails inspire nanobiotechnology

December 2, 2016

Just like workers in a factory, enzymes can create a final product more efficiently if they are stuck…
Sperm production induced in female silkworms

November 3, 2016

A group of University of Tokyo researchers and their collaborators embedded a male sex gene into the genome…
Researchers Find Fertility Genes Required for Sperm Stem Cells

September 29, 2016

The underlying cause of male infertility is unknown for 30 percent of cases. In a pair of new…
Cannabinoid receptor activates spermatozoa

September 4, 2016

During fertilization, a sperm must first fuse with the plasma membrane and then penetrate the female egg in…
Chilling findings are good news for koalas

June 29, 2016

University of Queensland research into the chilled storage of koala semen has major implications for the assisted breeding…
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