It’s the most advanced stage of lab\u002Dmade embryo created with human material
A heartbeat emerges at day 23 of a natural embryo, while red blood cells form in the fourth week.
“When I saw the for the first time, I was scared, honestly,’ Neupane told the Guardian before he presented the findings. “It was overwhelming for me. People get emotional when you see the heartbeat.” The researchers grew the structure by placing stem cells, a “mother cell” that can transform into most other cells, in a rotating bottle that served as a basic artificial uterus. The structure lacked a brain, and due to the missing tissues, diverged from the stages natural development.
“At the later time points they don’t have all the features of embryos,” Neupane noted. “It would be dangerous to compare them directly to in vivo embryos.”Article contentResearchers believe that looking into the early stages of an embryo’s development could help understand how genetic abnormalities can form and give insight into why pregnancy can fail at the earliest stages of life.
France Dernières Nouvelles, France Actualités
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