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image: Image of the Day: Sperm Protectors

Image of the Day: Sperm Protectors

By | August 18, 2017

Among their many functions, macrophages in mouse testes guard sperm against attacks by other immune cells. 

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image: Smartphone Semen Assay

Smartphone Semen Assay

By | March 23, 2017

An app-based sperm analyzer screens for signs of male infertility.

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image: Promiscuous Mice Have Extra-Fast Sperm

Promiscuous Mice Have Extra-Fast Sperm

By | October 19, 2016

The tails of polygamous deer mice sperm have longer midsections than the sperm tails of monogamous individuals of a similar species, and this correlates with improved swimming and competitive ability.

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image: Study: Mitotic Cells Can Reprogram Mouse Sperm

Study: Mitotic Cells Can Reprogram Mouse Sperm

By | September 13, 2016

Murine embryos undergoing first cell division can reprogram injected sperm and develop normally. 

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image: Scientists Solve Giant Sperm Paradox

Scientists Solve Giant Sperm Paradox

By | May 26, 2016

A study reveals why some male fruit flies produce sex cells that are 20 times the length of their bodies.

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image: Skin Cells Turned Into Immature Sperm

Skin Cells Turned Into Immature Sperm

By | April 29, 2016

The reprogrammed germ-like cells were unable to fertilize eggs, however. 

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image: Next Generation: Sperm-Catching Beads

Next Generation: Sperm-Catching Beads

By | April 27, 2016

Sperm-binding, peptide–coated beads work as an implantable contraception device in mice and as a means of selecting human sperm for assisted reproduction techniques, researchers show. 

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image: Week in Review: February 22–26

Week in Review: February 22–26

By | February 26, 2016

Questions about how E. coli evolves; spermatids in a dish; fighting bacteria with virus-like molecule; what drives metastasis; antibodies fight Ebola in monkeys

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image: Toward Making Sperm in the Lab

Toward Making Sperm in the Lab

By | February 25, 2016

Researchers devise a technique for creating gametes from murine embryonic stem cells.

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image: Surrogate Genes Enable Reproduction

Surrogate Genes Enable Reproduction

By | January 28, 2016

Increasing the expression of two genes from non-Y chromosomes restores spermatogenesis in male mice that lack Y chromosomes.

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