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Understanding how eggs keep their chromosomes intact over decades

Researchers at Chiba University have identified a protein called OMC1 that maintains chromosome cohesion in eggs from fetal development to adulthood, potentially mitigating age-related decline in egg quality. This discovery has significant implications for reproductive health in societies where childbirth is increasingly delayed.

SourceChiba University·JournalNature Aging·TypeExperimental study·DateOct 29, 2026

Paused at the right moment

A team of scientists has identified a key protein involved in regulating the second arrest in meiosis II, allowing the matured egg to await fertilization. Cyclin B3 keeps the availability of Emi2 below a critical threshold during the first maturation division, preventing premature arrest.

SourceUniversity of Konstanz·JournalDevelopmental Cell·DateOct 11, 2022