Then researchers placed blastoids and embryos donated after infertility treatments inside the little device and watched it ...

What do the earliest stages of a pregnancy look like? Embryonic development has been extensively studied, but most of our knowledge of the earliest stages of a growing baby come from stationary ...

A new study from the MRC Laboratory of Medical Sciences (LMS) in London, UK reveals how ancient viral DNA once written off as ...

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 ...

After three long essays in the New York Times’s “Embryo Question,” the series ends with a stunning confession of complete indecision about what the human embryo is — aside from the assertion that ...

Cambridge University researchers developed the world’s first synthetic human embryo models using stem cells but without using an egg or sperm, which has sparked ethical concerns and questions about ...

The viral transposable element, MERVL, acts as a central switch during early embryonic development, driving totipotent gene ...

Using the fruit fly, scientists have constructed a complete and detailed single-cell map of embryo development. This research will also help scientists pursue questions like how mutations lead to ...

Seals give birth only when conditions are right. After mating, a female seal can delay implantation of the embryo in the ...