The earliest days after fertilization, once a sperm cell meets an egg, are shrouded in scientific mystery. The process of how ...

Scientists at a technology company said Sunday they have created human embryos through cloning, drawing criticism from President Bush and lawmakers and raising new ethical questions. Advanced Cell ...

Human embryos briefly exhibit traits like tails and gill-like structures, revealing our evolutionary history and deep ...

In the mouse developing embryo, she previously demonstrated a bias at the two-cell stage: one cell contributed more to fetal tissue and the other to the placenta. 4 “We know so little about the very ...

Scientists have found a way to study early embryonic development without real embryos. Using CRISPR, they programmed stem cells to self-organize into structures mimicking early embryos. The cells show ...

Using CRISPR-based engineering methods to prompt stem cells to organize into embryo-like structures, scientists at UC Santa Cruz were able to create “programmable” cellular models of embryos without ...

Researchers have discovered that the earliest days of embryo development have a measurable impact on a person's future health and aging.