News & Opinion
Top 10 Innovations
Cell & Molecular Biology
Disease & Medicine
Ecology & Environment
Genetics & Genomics
Pharma & Biotech
Image of the Day
Promiscuous Mice Have Extra-Fast Sperm
Jef Akst | Oct 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.
Study: Mitotic Cells Can Reprogram Mouse Sperm
Ashley P. Taylor | Sep 13, 2016
Murine embryos undergoing first cell division can reprogram injected sperm and develop normally.
Scientists Solve Giant Sperm Paradox
Tanya Lewis | May 26, 2016
A study reveals why some male fruit flies produce sex cells that are 20 times the length of their bodies.
Skin Cells Turned Into Immature Sperm
Tanya Lewis | Apr 29, 2016
The reprogrammed germ-like cells were unable to fertilize eggs, however.
Next Generation: Sperm-Catching Beads
Anna Azvolinsky | Apr 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.
Week in Review: February 22–26
Jef Akst | Feb 26, 2016
Questions about how
evolves; spermatids in a dish; fighting bacteria with virus-like molecule; what drives metastasis; antibodies fight Ebola in monkeys
Toward Making Sperm in the Lab
Rina Shaikh-Lesko | Feb 25, 2016
Researchers devise a technique for creating gametes from murine embryonic stem cells.
Surrogate Genes Enable Reproduction
Jyoti Madhusoodanan | Jan 28, 2016
Increasing the expression of two genes from non-Y chromosomes restores spermatogenesis in male mice that lack Y chromosomes.
Week in Review: November 30–December 4
Jef Akst | Dec 4, 2015
Historic meeting on human gene editing; signs of obesity found in sperm epigenome; top 10 innovations of 2015; dealing with retractions
Obesity Alters Sperm Epigenome
Karen Zusi | Dec 3, 2015
Moderately obese men display different epigenetic marks on their sperm than lean men, and bariatric surgery in massively obese men correlated with changes in sperm methylation.