According to the National Institutes of Health, more than 70 million Americans are affected by digestive disorders. To help women, who, Harvard gastroenterologist Wolf states, are particularly vulnerable, mark differences between normal digestive and bowel function, chronic problems eroding life satisfaction, and life-threatening conditions, she describes risks and symptoms for gas, heartburn, acid reflux, constipation, diarrhea and food poisoning; colitis; gallstone, Crohn's and celiac diseases; irritable bowel syndrome and inflammatory bowel disease (IBS/IBD); and esophageal, stomach, and colon cancers. Wolf covers diet and lifestyle choices that cause or contribute to relatively minor problems; warning signs of serious conditions; the myriad available tests, treatments and medications; impact of digestive disorders on pregnant women; and links between such disorders, PMS, and endometriosis. Wolf's accessible q&a format, personal stories, easygoing humor, and practical concern for tight budgets and work schedules will relieve much of the anxiety and shame that, she says, prevent many women from seeking appropriate medical care. With her many insights and tips for choosing sympathetic health care providers, Wolf's proactive approach should encourage readers who have become resigned to making the bathroom the center of their lives. (Feb.)