Scientists have created embryo models to help study the mysteries of early human development, the medical problems that happen before birth and why many pregnancies fail.
“They’re complete enough to give you a picture of what may be happening in the embryo during pregnancy, but they’re not so complete that you could actually use them for reproduction,” said Insoo Hyun, an ethicist and director of life sciences at Boston’s Museum of Science. “It just will not work.”Several groups are working on the research. Teams with researchers from the United States and England shared their work in two studies published Tuesday in the journal Nature.
The authors of one Nature paper described models that resemble human embryos nine to 14 days after fertilization. In the other Nature paper, Magdalena Zernicka-Goetz, an expert in stem cell biology at the California Institute of Technology and the University of Cambridge in England, and colleagues said their model mirrors development up to 14 days from fertilization. That model contains embryonic tissues and tissues that can go on to produce structures surrounding the embryo such as the placenta and yolk sac.
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