May 13, 2024 mygyno Lifespan, also referred to as longevity, is the duration of an individual’s existence. Human longevity has continued to increase over time. Factors that influence longevity include genetics, the environment, natural events, human activities, advances in medical care, and even our individual habits. Some of these factors aren’t within your control. But there are simple things you can do to positively influence a longer and healthier life.