movements along a demand curve are related to a change in price resulting in a change in quantity shifts is demand d1 to d2 are specific to changes in income preferences availability of substitutes and other factors
Signs and symptoms of an early miscarriage (or chemical pregnancy) would generally be spotting or vaginal bleeding similar to a menstrual period, and possibly some abdominal cramping. The bleeding might have more clots than a menstrual period; the clots would look like tiny lumps in the vaginal discharge.
Most miscarriages occur during the first trimester of pregnancy. The most common cause of miscarriage is chromosome problems in the embryo. Signs and symptoms of miscarriage depend on the person and the timing of the loss. Of note, a sign is something that is evident to an observer. A sign is objective.