(Yahoo) – Scientists have developed a human embryo “blueprint” using human stem cells, in a breakthrough that could provide vital insight into the early stages of infant development, new research showed Thursday. Teams from the University of Cambridge and the Netherlands-based Hubrecht Institute said their model will allow them to observe never-before-seen processes underlying the formation of the human body.

The layout of humans — known as the body plan — happens through a process known as gastrulation, where three distinct layers of cells are formed in the embryo that will later give rise to the body’s three main systems: nervous, musculoskeletal and digestive. Gastrulation is known as the “black box” period of human development as legal restrictions prevent scientists from developing embryos in the lab beyond 14 days.

The team behind the study, published in Nature, said their model resembles an embryo between 18 and 21 days old, around the same time as gastrulation occurs. Many birth defects happen during this period, and a better understanding of gastrulation could aid our understanding of issues such as infertility, miscarriage and genetic disorders, the researchers said. “Our model produces part of the blueprint of a human,” said lead author Alfonso Martinez-Arias, from Cambridge’s Department of Genetics. READ MORE


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