The Embryo-Like Structures That Mimic Natural Embryos Fail to Develop Normally

The transplanted structure is also formed early gestational sacs, fluid-filled cavities that surround a developing embryo. The structures didn't develop normally points to the fact that they're not the same as natural embryos," an embryologist says. For now, scientists want to use them to better understand early pregnancy because monkeys are closely related to humans evolutionarily.