âEmptyâ literally means âcontaining nothing.â When it comes to food, empty means that that food contains little or no essential vitamins or minerals. In other words, these foods provide nothing of value to your body beyond calories that create excess pounds.
While menstruation usually begins between ages 12 and 13, it may happen at a younger or older age. The first menstrual period is called menarche.. The menstrual cycle is about four weeks long, starting on the first day of bleeding and ending when the next period begins. However, it can vary greatly when a girl first starts her period. It may skip months or come several times per month in the beginning.
An average menstrual cycle lasts 28 to 29 days. That's counting from the first day of your period to the day before the next (Fehring et al 2006). Some women have much shorter cycles, lasting only 22 days, and some have much longer ones, lasting up to 36 days. Itâs also common for the length of your cycle to vary from month to month (Fehring et al 2006).