Sperm cells

Fertilization process illustration: depositphotos.com

Eggs from men and sperm cells from women: How stem cells may change the way we reproduce

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In theory, a male skin cell can be turned into an egg and a female skin cell into a sperm cell. There is also the possibility of a child genetically connected to several parents, or only to one parent
Sperm cells in the race to fertilize the egg in the uterus. Illustration: depositphotos.com

New study: 50% decrease in men's sperm count in the last 50 years all over the world

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In the most comprehensive study done on the subject, it was found that sperm quality deteriorates over the years in men all over the world, including in Africa, Latin America and Asia, and that the rate of decline even increases in the 21st century * "Research
Changes in DNA organization during sperm cell development. From left to right: developing sperm cells (beginning of meiosis), developing sperm cells (after meiosis) and mature sperm cells. Top row: microscope images of the cells with the DNA marked in black. Bottom row: Hi-C experiment interaction maps, depicting spatial structures of DNA (rectangular shapes). You can see that at the beginning of meiosis, when the DNA is compacted, the structures are present but weaker; They get stronger after meiosis; And they reach their peak strength in mature sperm cells. Illustration by Prof. Stoshi Namakawa, Cincinnati Children's Hospital

New discoveries about DNA organization during sperm formation

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Sperm cells. Illustration: shutterstock

Researchers have found a way to grow and produce human sperm cells in culture

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The AS-beta protein (green), which is expressed on the surface of the mitochondria, the organelles responsible for the production of energy in the cell, enables the separation between the sperm cells in the mature ferment fly. Cell nuclei are marked in blue

Destruction builds life

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The different location of different opsins on a human sperm cell, as seen under a microscope, revealed by fluorescent antibody labeling (in bright yellow)

Sperm cells navigate their way using vision proteins

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A centriole as photographed with an electron microscope. Photo: © Pierre Gönczy/EPF

Beyond genes: do centrioles carry biological information?

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Confocal microscope observation of two mature fruit fly testes filled with dividing germ cells (in green). About a quarter of these cells (in red and pink) die in the alternative death pathway

Alternative death

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Prof. Mohammad Khalihal, Ben-Gurion University. PR photo

A significant breakthrough in the field of male fertility: researchers succeeded in creating murine sperm cells in culture

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Human cells - Image: University of California, San Diego

Cut a cake with a bulldozer

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Injection of sperm into the egg in in vitro fertilization. From Wikipedia

The gene responsible for the production of human sperm cells is 600 million years old

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Cosmic scene with DNA, stars, solvents and atomic circles in oral flow.

Scientists from the United Kingdom claim to have succeeded in producing human sperm from stem cells

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Sperm cells penetrate the egg during natural fertilization. From Wikipedia

Death in the service of life

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