Preheat oven to 350F.
Lightly grease a 9x5 loaf pan with cooking spray and set aside.
In a large mixing bowl combine yogurt, pumpkin, eggs, sweetener, vanilla, cinnamon, nutmeg, baking soda and salt; whisk until completely incorporated.
Add flours and stir until thoroughly combined.
Fold in 1/3 cup of the chocolate chips.
Pour batter into previously prepared loaf pan.
Add the remaining chocolate chips over the top and bake for 40 minutes, or until a toothpick inserted in the center of the bread comes out clean.
Remove from oven and let cool in pan for 10 minutes.
Remove from loaf pan and set over a cooling rack to cool completely.
Cut and serve.