Shiva following the Loss of life of Sati had entered into a deep meditation. Without his energy no generation was attainable and this brought about an imbalance in the universe. To provide him from his deep meditation, Sati took delivery as Parvati. Devi Tripura Sundari is usually popularly referred https://www.youtube.com/watch?v=OnBTYRqg61k&t=6s