New research suggests that an unexpected animal, the veiled chameleon, may offer scientists a new model for studying human ...

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 ...

In in vitro fertilization treatment, it is known that when pregnancy is desired at an older age, the incidence of chromosomal ...

During pregnancy, the human embryo is initially supplied with nutrients through the yolk sac; later, the placenta takes over ...

Using CRISPR-based engineering methods to prompt stem cells to organize into embryo-like structures, scientists were able to create 'programmable' cellular models of embryos without ever experimenting ...

At least, sort of. Scientists found that brains are actually made up of two organs instead of one, upending our basic ...

A lot happens in the first month of human embryo development as a single cell morphs into multitudes. Yet despite its significance, this period is basically a “black box” to researchers, says stem ...

Animal embryos go through a series of characteristic developmental stages on their journey from a fertilized egg cell to a functional organism. This biological process is largely genetically ...

Tiny, striped zebrafish are helping scientists trace how a gene linked to albinism influences eye development, work that may ...

Multicellularity is one of the most profound phenomena in biology, and relies on the ability of a single cell to reorganize itself into a complex organism. It underpins the diversity in the animal ...

Cell division is an essential process for all life on earth, yet the exact mechanisms by which cells divide during early embryonic development have remained elusive – particularly for egg-laying ...