When you take a closer look at the list of the bloodiest and most violent murders throughout the history, the chances are you will mostly encounter male names. Female serial killers are incredibly rare in our society. Women are unlikely to go out on a random killing spree and injure more than one person in a cruel way. When women do kill, they prefer using poison and their motives are very personal and driven by passion. Of course, there are always exceptions to the rule like Aileen Wuornos who became the most famous female serial killer. She shot and killed seven men in Florida over the course of several years.