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 — ...

The fusion of sperm and egg gametes during human fertilization establishes a diploid zygote and initiates a series of cell divisions that result in a multicellular embryo. The blastocyst stage is ...

Genomic scientists have revealed new insights into the process of human embryonic development using large-scale, whole-genome sequencing of cells and tissues from adult humans. The study analyzes ...

Advances in genetic and computational tools have enabled researchers to study complex networks of gene expression in individual cells, and the patterns of gene expression in a population of cells ...

Researchers uncovered key networks that simultaneously control pluripotency and readiness for cell death (apoptosis), helping to ensure optimal conditions for embryonic development. The study's ...

During implantation, the human embryo is hidden inside a “black box.” Although peeking inside has been prohibited by the 14-day rule, which restricts in vitro studies to preimplantation events, a new ...

A team of researchers in the United States and the United Kingdom says they have created the world’s first synthetic human embryo-like structures from stem cells, bypassing the need for eggs and sperm ...