The early weeks of pregnancy are fragile—and confusing. Here, the answers to your questions.
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Old Habit: Not drinking enough water
Why it's bad Your blood volume nearly doubles by the third trimester, so you need plenty of water to help create it. Poor fluid intake can lead to lightheadedness and fainting, and dehydration can land you in the hospital facing serious consequences, including abnormally low amniotic-fluid levels and preterm labor.
New healthy habit Slayton recommends drinking at least eight 8-ounce glasses of water a day. "Pale and plentiful urine is the key that signifies you're drinking enough]," she says. To stay hydrated, try keeping bottles of water with you at all times, and make deals with yourself throughout the day: You won't go to lunch until you finish a bottle; you have to polish off a bottle before your afternoon meeting is over. You get the drift.