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microscopy image series showing 8 days of embryo development
Mouse Embryo: No Sperm, Egg, or Uterus Required
Using stem cells and a bioreactor, researchers generated living embryos that survived for more than a week and began to develop internal organs.
Mouse Embryo: No Sperm, Egg, or Uterus Required
Mouse Embryo: No Sperm, Egg, or Uterus Required

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

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

embryos
Lab-Grown Mouse Embryos Form Limbs and Organs
Lisa Winter | Mar 19, 2021 | 3 min read
The embryos completed one-third of their total gestation outside of a uterus.
New Techniques Detail Embryos’ First Hours and Days
Jef Akst | Dec 1, 2017 | 10+ min read
New technologies reveal the dynamic changes in mouse and human embryos during the first week after fertilization.
Scientists Doubt Results of CRISPR’d Embryos
Aggie Mika | Aug 31, 2017 | 2 min read
Six scientists question the authors’ conclusions about the DNA repair process that led to the human embryos’ correction of a defective gene.
Call for Germline Editing Moratorium
Jef Akst | Mar 13, 2015 | 2 min read
In response to speculation that groups have edited the DNA of human embryos, researchers request that gene editing of human reproductive cells be halted.
Dinosaur Embryo Graveyard
Ed Yong | Apr 10, 2013 | 3 min read
A treasure trove of fossilized dinosaur embryos shows signs of extremely fast growth.
Coming to Terms
Anna Ajduk and Magdalena Zernicka-Goetz | Nov 1, 2012 | 10+ min read
New noninvasive methods of selecting the most viable embryo could revolutionize in vitro fertilization.
Self-cloning Coral
Hannah Waters | Mar 1, 2012 | 3 min read
Coral embryos broken apart by waves can continue developing into adult clones.
Coral Clones
Hannah Waters | Mar 1, 2012 | 1 min read
The colorful and fragile start to the life of a living reef
Test-Tube Zoo Babies
Jef Akst | Mar 1, 2012 | 4 min read
A National Zoo researcher works to perfect gamete preservation and in vitro fertilization techniques in order to better manage endangered populations.
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