With the current development of biomedicine, under normal circumstances, as long as a person does not want to die and their life span is not truly exhausted, it is difficult to die.
However, saving an embryo is not the same as treating a patient; it is a highly complex scientific challenge that involves a vast array of disciplines such as biology, physics, chemistry, electromagnetism, real energy, material science, and more.
At this stage, the embryo is only the size of a bean, with a scaled-down microscopic structure.
Calling it an organ would be an overstatement since it's smaller than a fingertip, but rekindling it is much more difficult than curing a terminal illness.
Countless facts have proven that the human body is the most complex structure on Earth, compared to a wide range of references, including but not limited to mammals, other living organisms, and even the Earth's own structure.