The average singleton baby is about 51cm (20in) long from head to toe and weighs approximately 3.4kg (7.5 lb) at birth. However, anything between 2.5kg (5.5lb) and 3.8kg (8.4lb) is a healthy weight for newborns. Twins tend to be lighter than singleton babies.
The depression originated in the United States, after a major fall in stock prices that began around September 4, 1929, and became worldwide news with the stock market crash of October 29, 1929 (known as Black Tuesday). Between 1929 and 1932, worldwide GDP fell by an estimated 15%.
Timeline America's Great Depression is regarded as having begun in 1929 with the Stock Market crash, and ended in 1941 with America's entry into World War II. However, to fully understand the Great Depression, one must look at it in context of events that happened before and after those dates.