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.
Miscarriage usually occurs in the first 12 weeks of a pregnancy (the first trimester), and most miscarriages occur without a clear cause. Vaginal bleeding is the most common sign of miscarriage. Some women may experience period-like cramping pain in the lower pelvis. Others may experience no symptoms at all.