oocyte

The findings answer the longstanding question of where these cells hold the mRNA needed to cope with the transcriptional halt preceding meiosis.

The cells’ mitochondria skip a key metabolic reaction that takes place in other cells in the body, a study finds.

The identification of the transcription factors that elicit oocyte growth will aid reproductive biology research and might help women with fertility issues, scientists say.  

The controversial oogonial stem cells eluded a team of Swedish researchers who mapped high-quality tissue samples of the human ovary, prompting more questions about the cells’ existence.  

A cancer patient who underwent the new fertility preservation procedure successfully gave birth five years after her immature eggs were collected.

Lampbrush chromosomes, first observed in the 19th century, still offer an unparalleled glimpse into how genetic information is organized in the cell.

New technologies reveal the dynamic changes in mouse and human embryos during the first week after fertilization.

The switch from maternal factors involves dynamic reprogramming of the zygotic genome.

Differences in the replicative advantages conferred by some mitochondrial DNA haplotypes have implications for mitochondrial replacement therapy, researchers report. 

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

For the first time, scientists generate functional mouse eggs from stem cells in culture.

Why do so many human eggs have the wrong number of chromosomes?

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. 

Eggs from excessively overweight mothers suffer mitochondrial damage that can be averted with pharmacological intervention, a mouse study finds. 

Researchers show that cells may have evolved to be small because of gravitational forces.

As reproductive tissues age, DNA repair mechanisms become less efficient, causing genomic damage to accumulate.

Researchers claim to have successfully transformed stem cells into viable mouse oocytes that produced healthy, fertile pups.

Opinion is divided on a new paper showing that adult ovaries do not contain egg-making stem cells, contrary to the findings of two recent studies that themselves appeared to overturn longstanding dogma.

Germline stem cells discovered in human ovaries can be cultured into fresh eggs.