A team of scientists has just gotten a closer peek into one of the earliest and most fundamental steps of creating a human life. Research out today highlights how they captured—for the first time—footage of human embryo implantation right as it’s happening.

Researchers at the Institute for Bioengineering of Catalonia (IBEC), in collaboration with Dexeus University Hospital, detailed their work in a study published Friday in Science Advances. Among other things, the footage shows that human embryos use force to burrow deep into the uterus for implantation. The new method may allow scientists to better understand why embryos so often fail to implant, and someday improve fertility treatment, the researchers say.

“The reason that we want to start studying implantation is because implantati

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