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.
Many women have a cycle that lasts 28 days. Some women may have cycles as long as 45 days. The cycle includes not just your period, but the rise and fall of hormones and other body changes that take place over the month. To see what happens on each day of your menstrual cycle check out our cool guide to your period. Keep in mind that your periods may not be regular at first. You may have two in one month, or have a month without a period at all. Also, at first your period may last just a couple of days in some months and up to a week in other months. Periods will become more regular in time.