The 14-day limit on scientific study of children conceived in vitro is already abhorrent, and any attempt to extend it should ...

A 6-day-old embryo model from Jacob Hanna’s lab in Israel has structures akin to ones found in human embryos 12 days after fertilization. Those structures include a ball of cells (top, purple ...

Recent breakthroughs in making stem-cell based human embryo models are raising urgent questions about to what extent they should be treated like natural embryos and whether they are open to misuse.

It’s time to step up the opposition to designer babies, says Marcy Darnovsky of the Center for Genetics and Society ...

Your body is like a busy city with construction crews working every day. These crews are your stem cells. They fix damage, ...

(RNS) — Scientists have created a human embryo without the use of sperm or an egg — a true test-tube baby. Such embryos cannot (yet) develop into full-grown human beings. Even if transplanted ...

In a scientific “first,” a tiny heart structure composed of human cells has been successfully grown within a pig embryo.

Embryos from women with PCOS carry changes in how their genes work, which may help explain why the condition runs in families ...

A human embryo into which a nonhuman cell or cells, or any component part of a nonhuman cell or cells, have been introduced; A hybrid human-animal embryo produced by fertilizing a human egg with a ...

Scientists found microplastics in fluids around human eggs and sperm. Plastics from cookware and packaging affect human ...