Remain being the lab rat for human experiments.

From Create Your Own Story

You have chosen the safeat path of remaining on the human's side in their world. You are continuously exposed to radiation and chemicals all day long for everyday of your life. This assault on your body weakens you from the inside as well as outside. Your life itself lasts for only five months. As the humans soon develop a formula effective in anhilating tour Species. And you ofcourse are the first one to go down. You and your aloen Species are doomed for good.