It turned out that the uterus “persuades” the embryo to “introduce” in the early stages of pregnancy

Scientists have developed a tiny "organ on a chip" the size of a small coin that mimics the early

pregnancy, when the embryo is implanted in the lining of the uterus.

In an article for the journal Nature Communicationsthe developers of the device described the new technology in detail. The small device is made of transparent silicone rubber. The same material used in some contact lenses. The device is equipped with two chambers: one for placental cells and the other for tiny three-dimensional blood vessels. The barrier runs between the two chambers and mimics the uterine tissue that passes under the embryo implanted in it.

"Organ on a chip" the size of a quarter. Image courtesy of Penn Medicine

In the experiments, scientists used a deviceto watch as trophoblasts — the cells that help the embryo attach to the uterus and then form part of the placenta — migrate to the organ's blood vessels before the embryo implants.

It turned out that the cells lining the bloodthe vessels of the organ actually help the trophoblasts in their "mission", as if "persuading" them. So, they turn on certain genes and secrete various proteins. With an "organ on a chip," biologists have been able to observe how this process occurs. The study also showed that certain immune cells may play a key but unnoticed role in preparing the uterus for implantation.

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