Described by Wikipedia thus:
Melatonin, also known as N-acetyl-5-methoxy tryptamine, is a hormone that is produced by the pineal gland in animals and regulates sleep and wakefulness. Melatonin is also produced in plants where it functions as a first line of defense against oxidative stress.
It is essential we produce it constantly for it quickly disappears from our bodies. We only produce melatonin when we sleep. It has to be concluded that it is likely, given that the pineal gland performs this function, that the magnetite is the ‘clock element’ that instructs the pineal gland when ‘night’ is because we do not produce melatonin in daylight. If you were to fall asleep in the garden on a sunny day, you would still not produce melatonin. It has to be in accordance with your circadian rhythm ensuring it is during night-time.
NASA discovered that when ‘astronauts’ are off the earth’s surface, they do not produce melatonin and it has to be provided for them in pills.
When a baby is born but particularly at the time when the waters break in the womb, I contend that it is the moment when magnetite is linked to the earth’s magnetic field and its position. It takes some three months after that for the baby to be embedded with it’s circadian rhythm. From then on the child is hooked onto the Earth. It’s base behaviour will be ‘informed’ and ‘underpinned’ unconsciously in all it is and does thereafter by its polarity.