The curved shape of a zebrafish egg causes unequal cell divisions, creating larger cells near the animal pole and smaller ...

The mystery of early embryonic communication is starting to be unraveled thanks to a new stem cell-based model.

Clare Kilcullen always wanted to be a mother, but when she went through early menopause in her 20s, she wasn't sure how that would happen. "[I thought] it would probably be an egg donor, but then in ...

An unusual pair of ears has taken the internet by storm, earning 37,000 upvotes on Reddit. User EducationalBus2231 shared a close-up photo of his ear, which appears “jagged around the edges,” adding ...

University of Cambridge scientists have used human stem cells to create three-dimensional embryo-like structures that replicate certain aspects of very early human development - including the ...

Every human life begins as a cluster of cells that soon face critical decisions. Within weeks, those cells must choose their fates – some forming the nervous system, others the gut, heart, or muscle.

Our ancient past isn't always buried history. When it comes to our DNA, nearly 9% of the human genome is made up of leftover genetic material from ancient viruses (called endogenous retroviruses or ...

Few sensations are as irritating or distracting as when your ears feel clogged, stuffy or “full.” Whether it happens on a plane, during a sinus infection, or even after sleeping in an odd position, ...

ST. LOUIS — Samantha was an embryo frozen in time for approximately a decade before a middle-aged single mother said yes to her birth. That mother was Dawn Jones-Goldstein, a 46-year-old Eureka woman ...

A confocal microscopy image of a nine-day-old human embryo, with specific proteins and cellular structures colored distinctively. Green relates to embryonic stem cells and magenta associates with ...

For the first time, scientists have recorded a human embryo implanting into a womb in real time, a feat the researchers hope will lead to new ways to treat infertility and prevent miscarriages. "Being ...

Researchers have captured the very first real-time, three-dimensional images and videos of a human embryo implanting into synthetic uterine tissue—revealing a key stage in reproduction. The resulting ...