The menstrual cycle is a series of natural changes in hormone production and the structures of the uterus and ovaries of the female reproductive system that makes pregnancy possible. The menstrual cycle is a natural process. It is a complex cycle controlled by female hormones that cause regular bleeding (periods).  … Continue readingMenstrual cycle (ovarian cycle), average blood loss in period, How many phase in menstruation, causes, symptoms, ages, Menarche and Menopause?