One reason for the surge in Adderall prescriptions is that increasing numbers of children and teenagers are getting an ADHD diagnosis. However, doctors also prescribe the drug to children and adults who do not have ADHD. This increased availability of Adderall has led to widespread abuse of the medication. Because Adderall increases dopamine levels, it can trigger a feeling of euphoria among people who don't have a medical reason to take it.
Menstruation is the most visible phase of the menstrual cycle and its beginning is used as the marker between cycles. The first day of menstrual bleeding is the date used for the last menstrual period (LMP). The typical length of time between the first day of one period and the first day of the next is 21 to 45 days in young women, and 21 to 31 days in adults (an average of 28 days).
Normal Menstrual Cycle - Menarche and the Teenage Menstrual Cycle. Menarche (say MEN-ar-kee) is a girl's first menstrual period. A first period usually happens after breasts, pubic hair, and underarm hair have begun to grow. Menarche is a sign of growing up and becoming a woman. It can happen as early as about age 9 or up to age 15. The first few periods are usually light and irregular. About 2 out of 3 girls have a regular pattern of menstrual periods within 2 years of menarche. During the teen years, periods may become longer and heavier.