The female menstrual cycle begins with the onset of menstruation (day 1) and ends with the day before the next menstruation. The entire cycle lasts between 26 and 29 days on average for most women, but shorter and longer cycles are also normal. Many women are unaware of what exactly happens in the body during this period. During the menstrual cycle, the amount of hormones in the body changes, possibly affecting the skin and mood. In addition to the processes that take place in the body, we would also like to inform you about external factors that can influence you and your menstrual cycle.