The Vyans are a peaceful race who came close to becoming extinct, when they had become unable to conceive. With an ageing population, and no children, they decided to try and find a solution. Whilst trying to experiment, a women came through the Stargate and offered to help them. However, soon after an experiment the people of Vyus were hit with Amnesia. When SG1 came through the gate, they used old research to help cure the amnesia of the planet, and once again let the Vyan race flourish.