Listen. Dr. James Naismith was a Canadian physical education instructor who invented the game of basketball in 1891 while working at the YMCA Training School in Springfield, Massachusetts.isten. Dr. James Naismith was a Canadian physical education instructor who invented the game of basketball in 1891 while working at the YMCA Training School in Springfield, Massachusetts.
Rarely, it can cause an infection of the lining of the heart, abnormal heart rhythms, or, for severe mitral valve prolapse, congestive heart failure during pregnancy -- but these complications can be safety treated with medication during pregnancy.
1 Pregnancy makes your blood more likely to clot. 2  Itâs your bodyâs way of helping the placenta to work during pregnancy. 3  Plus, it prevents you from losing too much blood during labour and birth. 4  Blood flows from the veins in your legs to your heart much more slowly. Pregnancy makes your blood more likely to clot. 2  Itâs your bodyâs way of helping the placenta to work during pregnancy. 3  Plus, it prevents you from losing too much blood during labour and birth. 4  Blood flows from the veins in your legs to your heart much more slowly.