A combination calcium magnesium supplement (with double the amount of calcium to magnesium) is apparently meant to help. (amotherinisrael.com)
The other more holistic approaches are using calcium magnesium. (pregnancymagazine.com)
My normal recipe includes 1 quart of tea (brewed with red raspberry leaf, alfalfa, nettle and Stevia), 1/4 tsp sea salt, 1 tsp calcium magnesium powder, and 1/4 cup grape or apple juice. (wellnessmama.com)