embryos

Studying human embryonic development is complicated for several reasons. Models derived from pluripotent stem cells representing distinct stages offer a path to studying this process.

Animals with human cells could provide donor organs or help us understand neuropsychiatric disorders.

Research on human embryos is usually limited to the first 14 days of development, but as scientific capabilities improve, some argue that it is time to go further.

Using stem cells and a bioreactor, researchers generated living embryos that survived for more than a week and began to develop internal organs.

The embryos completed one-third of their total gestation outside of a uterus.

New technologies reveal the dynamic changes in mouse and human embryos during the first week after fertilization.

Six scientists question the authors’ conclusions about the DNA repair process that led to the human embryos’ correction of a defective gene.

In response to speculation that groups have edited the DNA of human embryos, researchers request that gene editing of human reproductive cells be halted.

A treasure trove of fossilized dinosaur embryos shows signs of extremely fast growth.

New noninvasive methods of selecting the most viable embryo could revolutionize in vitro fertilization.

Coral embryos broken apart by waves can continue developing into adult clones.

The colorful and fragile start to the life of a living reef

A National Zoo researcher works to perfect gamete preservation and in vitro fertilization techniques in order to better manage endangered populations.