See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. What do the earliest stages of a pregnancy look like? Embryonic ...

A popular vanilla flavoring in e-cigarettes may interfere with some of the earliest steps of human development. In lab ...

Stem cell-based embryo models (SCBEMs) offer new ways for studying early human development while circumventing ethical challenges associated with natural embryos. Traditionally, SCBEMs are categorised ...

The earliest days after fertilization, once a sperm cell meets an egg, are shrouded in scientific mystery. The process of how a humble single cell becomes an organism fascinates scientists across ...

A small tissue fold in fly embryos, once thought purposeless, plays a vital role in stabilizing tissues. Researchers show that it absorbs stress during early development, and its position and timing ...

A molecular pathway known for controlling cell shape and movement also helps regulate the rhythm by which the vertebrate body ...

UC Riverside researchers report vanillin knocks early human stem cells off course at trace doses.

Learn how a slower-growing gut helps snake embryos curl into a spiral, allowing their long bodies to develop inside an egg.

For several years, researchers studied human embryonic stem cells (ESCs) to understand the unique features of these pluripotent cells, but on their own, they poorly resembled the complex structures ...