Every 1000 years, a total solar eclipse covers the entire disk of the sun and covers the earth in its shadow. During this event, the barrier that separates the mortal world from the spiritual world weakens, allowing demons to cross over into our realm. These creatures serve Femto, an ancient being that leads a pantheon of deities known as the Godhand. Femto seeks to combine both realms into one, making him ruler of creation. As he is too powerful to cross over directly during the eclipse, he must reincarnate a portion of his power to enter it directly. This child will be immediately born to a mortal during the eclipse, allowing him to work towards bringing down the barrier permanently. Fortunately, a sect of Druidic warriors has taken it upon themselves to guard our world against this plot. This group, known as the Band of the Hawk, use a druidic spell upon the mortal vessel, preventing the birth of Femto and trapping him in the spiritual realm. Every 1000 years, a new vessel is chosen by Femto, forcing the Druids to track down the mortal and repeat the process, imprisoning Femto for another thousand years. The rise of the catholic church during the middle ages has been detrimental to the existence of pagan groups. A purge by the Inquisition has wiped out sects associated with "witchcraft", leading to the extinction of the Band. This allows Femto to proceed with his plan unheeded. However, every new vessel has died in childbirth during the eclipse, preventing Femto from being born into the mortal world and keeping him trapped in his realm.
Premature death was a constant thing in the past, as the quality of life was very low. Susceptibility to diseases, poor knowledge of medicines, and lack of access to healthcare was common for most people, reducing life expectancy. Today, however, the situation is vastly different. People can expect to live to a decent age due to an increase in the standard of living and access to life-saving medicine. Maternity death rates have dramatically decreased over time and are getting lower across the world. This should lead to Femto being able to accomplish his goal, but this has not panned out the way it should.
How can these two events be linked to each other?