Sri Matre Namaha
Stanabhara-dalanmadhya-pattabandha-valitraya – The thirty sixth name in Lalitha Sahasranamam.
Stanoyohrbharena dalat iva madhyasya pattabandhah valitrayam yasyah sa
The three folds on her belly form the belt which supports her waist because of the burden of her breasts.
The golden belt that she wears supports her waist and her waist bends under the heaviness of her bosoms, resulting in three folds in her stomach area. SL 80 is also on the same lines. The possible interpretation could be that Her compassion to the universe is vast which is referred to as heaviness here. The three lines in her stomach indicate her three activities – creation, sustenance and dissolution. Her time for compassion is more than her other activities. After all She is the Mother of all.