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).
How the menstrual cycle works. 1  Your cycle starts on the first day of your period and continues up to the first day of your next period. 2  At the same time, eggs begin to mature in the ovary. 3  The lining of the womb starts to thicken in readiness for fertilisation. During ovulation your cervical mucus becomes thinner and clearer to help the sperm to reach the released egg. About 10 to 16 days before the start of your next period, an egg is released from one of the ovaries (ovulation). If sperm is present at the moment of ovulation, or some time during the next 24 hours, the egg may be fertilised.