Do coffee, tea, and other drinks count toward my daily water?

Fluids in milk, soup, diluted juice, and water-rich fruits and vegetables all contribute to your total. Caffeinated drinks contain water too, but pregnant women are generally advised to keep caffeine moderate, so they should not be your main source. Plain water remains the best default, and sugary sodas add calories without helping much.

Can dehydration really cause contractions?

Dehydration is a well-known trigger for Braxton-Hicks contractions, the irregular tightenings that do not change your cervix. Drinking water and resting often calms them. If contractions become regular, grow stronger, do not stop after fluids and rest, or occur before 37 weeks, contact your provider promptly. This article is education, not a diagnosis.

What if I cannot keep water down because of morning sickness?

Try small sips every few minutes, very cold water, ice chips, or popsicles, and separate drinking from eating. If you cannot keep fluids down for a day, are urinating very little, or feel faint, call your provider, because persistent vomiting with dehydration needs medical attention.

Nutrition

How much water do you need during pregnancy? Hydration, explained

May 26, 2026 · 7 min read

Water is one of the simplest things you can do for your pregnancy, and one of the easiest to forget. Your body is building blood, amniotic fluid, and an entire support system for your baby, and all of it runs on water. Here is how much you actually need, how to spot dehydration early, and how to keep up when the thermometer on the border does not cooperate.

A warm, hopeful moment between a mother and her child

Why your fluid needs rise in pregnancy

Pregnancy puts your body in construction mode. Your blood volume expands to carry oxygen and nutrients to the placenta, your body produces and constantly refreshes amniotic fluid, and your kidneys work harder to filter waste for two. Water also helps form the tissues your baby is building, carries nutrients across the placenta, softens stool to ease the constipation so common in pregnancy, and helps your body regulate temperature. Every one of those jobs draws from the same supply, which is why the amount that kept you comfortable before pregnancy is usually not enough now.

How much water: the 8 to 12 cups guideline

The American College of Obstetricians and Gynecologists advises pregnant women to drink 8 to 12 cups of water a day, which is 64 to 96 ounces (ACOG). That is a range, not a single magic number, because your size, activity, climate, and stage of pregnancy all matter. A practical self-check is your urine: pale yellow generally means you are keeping up, while dark yellow or amber suggests you need more. If you are vomiting from morning sickness, exercising, or spending time in the heat, aim toward the higher end and sip steadily rather than gulping all at once.

Signs of dehydration and the Braxton-Hicks connection

Early signs of dehydration in pregnancy include thirst, dark urine, urinating less often, dry mouth, headache, fatigue, and feeling dizzy or lightheaded when you stand. There is also a connection many mothers notice firsthand: dehydration can trigger Braxton-Hicks contractions, the irregular practice tightenings of the uterus. If your belly starts tightening on a hot afternoon, the standard first step clinicians suggest is to drink water and rest on your side; Braxton-Hicks contractions often ease after that. Contractions that keep coming at regular intervals, get stronger, or arrive before 37 weeks are a different matter: call your provider right away, and call 911 for any emergency.

Hydration in border-region heat

Along the US-Mexico border, hydration is not a polite suggestion, it is a daily safety task. Long stretches of triple-digit summer heat in Arizona, the California desert, and Texas mean you lose water through sweat even when you are not exercising. Add bus stops without shade, long waits at crossings, outdoor work, and homes where air conditioning is expensive to run, and the math gets harder. Plan around the heat: carry water everywhere, drink before you feel thirsty, schedule errands for early morning or evening, and treat dizziness, cramping, or a racing heart in the heat as a signal to stop, cool down, drink, and call your provider if it does not pass.

Tactics that actually work

Most people do not fail at hydration because they do not know they should drink; they fail because the day gets in the way. Tactics that help: keep a filled bottle with marked levels in sight at all times, anchor a glass of water to things you already do (waking up, every meal, every bathroom trip), flavor water with lime, cucumber, or frozen fruit if plain water turns your stomach, and eat water-rich foods like watermelon, oranges, cucumber, and broth-based soups. Milk and diluted juice count toward your total too. If nausea makes drinking hard, try small frequent sips, cold water, ice chips, or a straw, and tell your provider if you cannot keep fluids down.

Tracking hydration with your Mommy Passport

What gets noticed gets done. With Materna's Mommy Passport, free for patients, you can log your water intake and symptoms just by talking, in English or Spanish, in the same place as your blood pressure, weight, and visit notes. Saying a quick note like 'I had six cups today and felt dizzy this afternoon' takes seconds, and it gives your care team a real picture instead of a guess at your next visit. Patterns like recurring afternoon headaches or frequent Braxton-Hicks episodes become visible, so the conversation with your provider starts from your actual days, not your memory of them.

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Frequently asked questions

Do coffee, tea, and other drinks count toward my daily water?: Fluids in milk, soup, diluted juice, and water-rich fruits and vegetables all contribute to your total. Caffeinated drinks contain water too, but pregnant women are generally advised to keep caffeine moderate, so they should not be your main source. Plain water remains the best default, and sugary sodas add calories without helping much.
Can dehydration really cause contractions?: Dehydration is a well-known trigger for Braxton-Hicks contractions, the irregular tightenings that do not change your cervix. Drinking water and resting often calms them. If contractions become regular, grow stronger, do not stop after fluids and rest, or occur before 37 weeks, contact your provider promptly. This article is education, not a diagnosis.
What if I cannot keep water down because of morning sickness?: Try small sips every few minutes, very cold water, ice chips, or popsicles, and separate drinking from eating. If you cannot keep fluids down for a day, are urinating very little, or feel faint, call your provider, because persistent vomiting with dehydration needs medical attention.