The rate at which CA125 levels rise can vary depending on the underlying cause. In some cases, CA125 levels may rise slowly over time, while in other cases, the increase can be more rapid. CA125 levels can be influenced by factors such as the size and aggressiveness of the tumor, the stage of cancer, and individual variations. It's important to note that CA125 levels alone cannot provide a definitive diagnosis or predict the progression of cancer. Further diagnostic tests and evaluation by a healthcare professional are necessary to determine the cause of elevated CA125 levels and establish an accurate diagnosis.