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Image of the Day
A Brush with Inheritance, 1878
Catherine Offord | Feb 1, 2018
Lampbrush chromosomes, first observed in the 19th century, still offer an unparalleled glimpse into how genetic information is organized in the cell.
New Techniques Detail Embryos’ First Hours and Days
Jef Akst | Dec 1, 2017
New technologies reveal the dynamic changes in mouse and human embryos during the first week after fertilization.
Infographic: How Embryos Take Control of Their Own Development
Jef Akst | Nov 30, 2017
The switch from maternal factors involves dynamic reprogramming of the zygotic genome.
Three-Parent IVF Advances
Anna Azvolinsky | Nov 30, 2016
Differences in the replicative advantages conferred by some mitochondrial DNA haplotypes have implications for mitochondrial replacement therapy, researchers report.
Week in Review: October 17–21
Jef Akst | Oct 21, 2016
Report finds that pathologist involved in anonymous defamation case committed multiple acts of misconduct; growing eggs from stem cells; neutrophils’ role in metastasis; convergent evolution in birds
From Stem Cell to Oocyte In a Dish
Anna Azvolinsky | Oct 17, 2016
For the first time, scientists generate functional mouse eggs from stem cells in culture.
A Scrambled Mess
Karen Schindler | May 1, 2016
Why do so many human eggs have the wrong number of chromosomes?
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.
Oocytes and Obesity
Ashley P. Taylor | Feb 10, 2015
Eggs from excessively overweight mothers suffer mitochondrial damage that can be averted with pharmacological intervention, a mouse study finds.
Gravity Determines Cell Size
Abby Olena | Oct 29, 2013
Researchers show that cells may have evolved to be small because of gravitational forces.