In many cultures, the moon is female. The moon goddess is the confidante of women and governs their rhythms. In the same way the moon controls the tides and other fluid flows on earth, it also influences the female cycle of growth and decline, of earthly and cosmic poles. While menstrual cycles no longer coincide with lunar cycles today, the parallels are clearly recognisable. In the first half of the typical 28-day hormonal cycle, the lining of the uterus thickens. The woman feels actively connected with the world. Ovulation takes place in the middle of the cycle. The uterus lining continues to grow and thicken until menstruation. Like the waxing moon just before reaching fullness, the woman now feels particularly heavy, sometimes even bloated or tense. The cycle concludes with menstruation, and the rhythmic oscillation between heaven and earth begins anew.