Parkinson disease is a progressive disorder of the nervous system. The disorder affects several regions of the brain, especially an area called the substantia nigra that controls balance and movement. Often the first symptom of Parkinson disease is trembling or shaking (tremor) of a limb, especially when the body is at rest. Typically, the tremor begins on one side of the body, usually in one hand. Tremors can also affect the arms, legs, feet, and face.
It might be heavy but short. It might only be spotting. A short period might mean you're pregnant. These can all be signs of a pregnancy. The only way to sort out the pregnancy from the rest of the reasons would be to take a pregnancy test. Sometimes what a woman mistakes for her period is really what we call implantation bleeding, a slight bleeding that occurs and the baby implants into your uterus.
The vagina, or birth canal, provides a path for menstrual fluids to leave the body. During a period, there are usually 2-3 days of relatively heavy bleeding followed by 2-4 days of lighter flow. The fluid during a menstrual period is a mixture of uterine lining tissue and blood.The total mo nthly menstrual loss varies from about 4 to 12 teaspoons.he 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.