The blood supply to the spinal cord involves a complex system of blood vessels. The main blood vessels are the anterior spinal artery (at the front of the spinal cord) and the posterior spinal artery (at the back). Spinal strokes are most common in the anterior spinal artery. Most spinal strokes are caused by blockages (usually blood clots) in the blood supply. These are called ischaemic spinal strokes.
There's no way to know exactly when you'll get your first period. One day, you'll begin to bleed from your vagina, and that's your period. It means that your body is healthy and normal. Most girls have their first period when they're between 9 and 15 years old.Your period may start around the time it started for other people in your family, like your mom or sisters.If you don't get your period by the time you're 15, you may want to talk with a doctor or nurse.here's no way to know exactly when you'll get your first period. One day, you'll begin to bleed from your vagina, and that's your period. It means that your body is healthy and normal. Most girls have their first period when they're between 9 and 15 years old.
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).enstruation, also known as a period or monthly, is the regular discharge of blood and mucosal tissue from the inner lining of the uterus through the vagina. Up to 80% of women report having some symptoms prior to menstruation.