Some newly reported clumps of cells growing in lab dishes have been hailed as the closest things to human embryos that scientists have ever made in the lab. These entities are human embryo models — ...

Each cell contains a set of instructions in its DNA that determines which genes are expressed and which are silenced. The correct programming of these so-called epigenetic programs, including DNA ...

Several human diseases arise due to defects in mitochondrial DNA (mtDNA), which is distinct from nuclear DNA and is inherited only from maternal ancestors. The prevention of these diseases by ...

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 ...