The sperm and the egg cell's nuclei compete for size directly after fertilization and this is necessary for proper embryonic ...

In the earliest hours after fertilization, an embryo takes its first steps toward becoming a living organism by shedding maternal control and activating its own genetic program. This critical process, ...

For the first time, a stem cell model has produced a structure resembling an early human embryo with a yolk-sac-like structure, from a single starting stem cell population and without direct genetic ...

Researchers discover that separate pronuclei in fertilized eggs create a competitive environment essential for maintaining ...

Biologists have provided new insights on a longstanding puzzle in biology: How complex organisms arise from a single fertilized cell. Producing a new 'gene atlas' with 4-D imaging, the researchers ...

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Over half of our genomes consists of thousands of remnants of ancient viral DNA, known as transposable elements, which are widespread across the tree of life. Once dismissed as the "dark side" of the ...

Researchers have identified Nr1h2, a critical transcription factor essential for early embryo development. Their findings enhance our understanding of gene regulation during blastoid formation and ...

For the first time, a stem cell model has produced a structure resembling an early human embryo with a yolk-sac-like ...

The days immediately after fertilisation mark one of the most crucial phases of early pregnancy. During week 3, a single ...