I guess that's part of the human cycle.

Death is part of our human cycle, and it eventually comes to everyone, sometimes earlier than we expect, sometimes later than we hope.

It is widely believed that the moon has a relationship with fertility due to the corresponding human menstrual cycle, which averages 28 days.

At the time, Miang was manipulating the government, and wanted to reset the human evolutionary cycle by starting a worldwide nuclear war.

The idea of lunar human cycles seems more plausible than a Friday the 13 th effect.

The lunar calendar also corresponds to the human menstrual cycle, connecting the number to femininity.

Variation of the human menstrual cycle through reproductive life.

A human cycle has been completed, and life goes on.

In contrast, infradian rhythms, such as the human menstrual cycle, have periods longer than a day.

The average human menstrual cycle is 28 days although no link has been established with the nightlighting and the Moon.