Pregnancy keeper: Extra calcium
Why: If you think you only needed extra calcium to build your baby's bones, think again. Almost 80 percent of women don't get the calcium they need daily (1,000 mg), and up to one-half are at risk for osteoporosis -- fragile bones susceptible to fractures. Research has also shown that calcium alleviates PMS.
Good habit helper: Keep taking your prenatal vitamin as long as your doctor recommends it, and then switch to a daily multivitamin. Make foods high in calcium (yogurt, milk, kale, broccoli, and salmon) part of your diet.