Pregnancy Heartburn Heartburn Facts First things first – heartburn is not caused by too much stomach acid – but rather too little. Lack of stomach acid slows the digestive process down which creates all kinds of havoc. Stomach acid signals the Lower Esophageal Sphincter (which separates the stomach and esophagus) to close tightly when the body has… Continue reading 8 Ways to Soothe Pregnancy Heartburn