For all of our mamas-to-be, we highly suggest starting with our Mama SPANX collection. This collection features our Mama Magic® waistband allowing you to wear your SPANX essentials from month one to baby and beyond. Plus, it comfortably supports your bump! Click there to check out our Mama SPANX collection.
For all other styles, it depends on how much your waist has increased and if you intend to wear it at your natural waistline or over your belly. The best way to know would be to measure your waist and see where the measurement falls on our size chart for each individual product.