The influence of full moon and lack of moon on tides, and how do the changes of tides react to women's menstrual period?

It is the moon and the sun that cause the sea to be so rough. The earth's attraction to water on the ground is millions of times greater than that of the moon and the sun. So the seawater stays on the earth and will not be sucked away by the moon and the sun. However, although the moon and the sun are far away from the ocean, they attract the ocean like huge magnets, which can suck away the nearby seawater and cause tides.

What are the rules of tides? The relative positions of the moon, the sun and the earth have great influence on the tides. For example, when the moon and the sun are in a straight line with the earth, the tidal force of the moon and the sun together will cause unusual tides. This tide is called spring tide, which occurs on the first and fifteenth day of each month in the lunar calendar. When the moon and the earth are at right angles to the two connecting lines of the sun and the earth, the tides are weak and the tidal range is small. Tidal range is the height difference between the sea surface at high tide and the sea surface at low tide. The tide is low. This tide is called small tide. Because the moon is much closer to the earth than the sun, the moon has a greater influence on the tides.

What drives the body to change repeatedly according to the menstrual cycle, just like the ebb and flow of tides? It's hormones. Ovary and uterus change with the concentration of estrogen and progesterone in blood, and the amount of estrogen and progesterone is determined by gonadotropin secreted by pituitary gland. How much gonadotropin the pituitary gland secretes depends on the arrangement of hypothalamus. Therefore, hormones produced by hypothalamus-pituitary-ovary regulate menstrual cycle, and this axial relationship is regulated by the central nervous system. It is no exaggeration to say that menstruation is a magical and subtle process of change in women's bodies.

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