Medical research

Developmentally arrested IVF embryos can be coaxed to divide

Why do two-thirds of in vitro fertilization (IVF) embryos go into developmental arrest? A new study publishing June 30th in the open-access journal PLOS Biology by Andrew Hutchins of Southern University of Science and Technology ...

Medical research

Researchers build embryo-like structures from human stem cells

Research on human embryos is vital to understanding the earliest stages of human development. Currently, this research is conducted on surplus embryos willingly donated by individuals who have undergone in vitro fertilization. ...

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Embryo

An embryo (irregularly from Greek: ἔμβρυον, plural ἔμβρυα, lit. "that which grows," from en- "in" + bryein "to swell, be full"; the proper Latinate form would be embryum) is a multicellular diploid eukaryote in its earliest stage of development, from the time of first cell division until birth, hatching, or germination. In humans, it is called an embryo until about eight weeks after fertilization (i.e. ten weeks LMP), and from then it is instead called a fetus.

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