The main symptom of placenta previa -- and the greatest risk to you and your baby -- is vaginal bleeding. If you have bled too much, you may have other symptoms, such as anemia, pale skin, rapid and weak pulse, shortness of breath, or low blood pressure. The bleeding that signals placenta previa may occur at the end of the second trimester or beginning of the third trimester. It may be heavy or light. Bleeding is usually painless, and it may happen without labor or during labor.
Quick Answer. On average, approximately 35 percent of people never develop wisdom teeth. This is highly dependent on ethnicity; nearly 100 percent of indigenous Mexican people, for example, never develop third molars, while almost 100 percent of indigenous Bantu people of Angola do develop them. Continue Reading.
However, some people have as many as six wisdom teeth and others have none. They can also begin to come in as early as 13 or as late as 25. Most people have their wisdom teeth removed to prevent overcrowding and discomfort. Most healthy adults end up with 28 teeth after their wisdom teeth have been removed. But many will lose some of these over time. How many Teeth Do Adults Need?