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 step is getting to know your body and understanding what is happening during your menstrual cycle: Your period is usually on a cycle of 28 days, though different women's cycles vary by a few days. The day you start bleeding is considered the first day of your cycle, meaning that 28 days or so from then you will bleed again and then your cycle will start all over. In other words, from the first day of one period until the first day of the next is your menstrual cycle.