You may be at higher risk for a ruptured ovarian cyst if you have polycystic ovarian syndrome (PCOS). PCOS causes many cysts to grow on your ovary. Any of the following can lead to a ruptured cyst: Hormone changes around the time of your monthly period. Pressure on the cyst from sports, sex, or an injury to the area (usually large cysts) Pregnancy.
American Civil War. American Civil War, also called War Between the States, four-year war (1861â65) between the United States and 11 Southern states that seceded from the Union and formed the Confederate States of America.
By Martin Kelly. The US Civil War lasted from 1861 to 1865 and led to over 618,000 casualties. Its causes can be traced back to tensions that formed early in the nation's history. Following are the top five causes that led to the War Between the States.. 1. Economic and social differences between the North and the South. With Eli Whitney's invention of the cotton gin in 1793, cotton became very profitable. This machine was able to reduce the time it took to separate seeds from the cotton.