For the first time, scientists have shown that the human embryo can develop more than a few days, while being in the womb. It used to be that this is impossible.

The experiments were conducted by scientists from the Rockefeller University in new York: for 12 days, the embryo developed completely normally, though he was in the lab. It is the largest scientific breakthrough, which can be used in the treatment of infertility and early miscarriages.

It will also help scientists to understand how the human organism develops and cells. This knowledge will help in the treatment of many diseases.

However, scientists had to interrupt the experiment due to legal restrictions. In the US, UK and many other countries, there is a "rule of 14 days": human embryos cannot be cultured in the laboratory for more than two weeks. Previously, this rule has not been disputed, as scientists could not keep the embryos alive for so long. Now, however, scientists had to destroy them in order not to violate these terms.

Scientists from Rockefeller University are calling to abolish this rule, because it limits their opportunities. This issue is controversial in the scientific community. Some experts insist that scientists need such restrictions, otherwise their experiments can go too far.