How Many Ounces Should a Pregnant Woman Drink?

Pregnant women should aim for 8 to 12 cups (64 to 96 ounces) of water per day, as recommended by ACOG.

Water recommendations tend to float around in general conversation — eight glasses here, half your body weight in ounces there. Once pregnancy enters the picture, that familiar advice tightens into something more specific, and the stakes feel higher.

The persistent question remains: how many ounces should a pregnant woman drink? The American College of Obstetricians and Gynecologists provides a clear starting range of 8 to 12 cups, or 64 to 96 ounces, per day. That added volume helps form amniotic fluid, build increased blood supply, and support digestion. Because individual needs vary with body size, activity level, and trimester, the range gives room to adjust. This article breaks down the guidelines so you can tailor the target to your daily routine.

What Counts Toward Your Daily Ounces

Water is the obvious starting point for meeting your daily ounces, but it isn’t the only source. Fluids like milk, herbal tea, broth, and sparkling water all count toward the day’s total.

So does the water hidden in foods — cucumbers, melons, oranges, and leafy greens are packed with it. Building your hydration habit around a mix of beverages and water-rich foods tends to feel less like a chore than forcing down glass after glass of plain water alone. This approach is especially useful during the first trimester, when nausea and food aversions can make plain liquids hard to tolerate.

The goal of 64 to 96 ounces is cumulative, not a requirement to drink only plain water. Diversifying your fluid sources can help you meet the recommendation without feeling waterlogged. Just be mindful of sugary drinks and caffeine, which can work against hydration if consumed in large amounts.

Why Staying Hydrated Gets Harder During Pregnancy

You would think the body’s built-in thirst mechanism would make hitting the target easy. Pregnancy complicates that signal in several ways that can quietly work against consistent hydration.

• Morning sickness and nausea: Vomiting causes direct fluid loss, and the mere thought of drinking water can trigger queasiness for some women, making it harder to stay on track.
• Frequent urination: The growing uterus presses on the bladder, leading to constant bathroom trips. Cutting back on fluids to reduce those trips is understandable but works against your needs.
• Increased blood volume: Plasma volume expands by roughly 40 to 50 percent during pregnancy. This extra demand pulls from your reserves, so falling behind on ounces can leave you dehydrated faster.
• Altered taste and smell: Heightened senses can make the taste or smell of tap water suddenly unappealing, leading many women to drink less without realizing it.
• Sweltering months or high activity: Exercise and heat increase sweat losses, raising your fluid needs well above the standard 64-ounce baseline.

Recognizing these roadblocks is the first step. Once you know why staying hydrated feels harder, you can work around each hurdle with strategies that fit your pregnancy stage and lifestyle.

The Official Recommendation and How It Breaks Down

The American College of Obstetricians and Gynecologists sets the pregnancy hydration baseline at 8 to 12 cups of water per day, which translates to 64 to 96 total ounces. ACOG explains the reasoning behind this target for blood volume and amniotic fluid in its ACOG water recommendation. The table below compares this standard with other common reference points.

The table shows that pregnancy needs sit above standard adult intake but below the demands of breastfeeding. Using 64 ounces as your daily floor and adjusting upward based on thirst, activity, and urine color is a practical way to apply the broad recommendation to your own routine.

Simple Strategies for Meeting Your Daily Ounces

Hitting 64 to 96 ounces daily takes some intention, especially on busy days. These practical steps help spread fluid intake across the day without requiring constant attention to a water bottle.

1. Keep a marked bottle at your desk or bag: A 24-ounce bottle filled three times covers the low end of the range. Marking it with time goals creates a visual schedule that keeps you on pace.
2. Eat your water: Incorporate high-water foods like watermelon, strawberries, cucumber, and zucchini. A serving of fruit counts toward total fluid intake and provides vitamins without added sugar.
3. Add flavor naturally: Infusing water with lemon, lime, cucumber, or mint can make it more appealing when plain water tastes off. Herbal teas are another zero-sugar option that counts fully toward your daily total.
4. Set a gentle reminder: A phone or watch reminder every hour or two prompts a few sips without overwhelming you. Tracking intake for a few days also helps identify the times you typically fall short.
5. Listen to your urine color: Pale straw to transparent yellow generally signals good hydration. If your urine is consistently dark, it’s a practical cue to bump up your fluid intake.

These strategies aren’t about perfection. The goal is to build small habits that reduce the mental load of staying hydrated so your daily ounces become an afterthought rather than a source of stress.

Understanding Your Body’s Hydration Signals

Your body sends reliable cues about its fluid status, and research helps quantify what adequate intake looks like. A 2024 study in PMC notes that total water needs during pregnancy reach about 3.0 liters per day, with roughly 2.3 liters coming from beverages. Per the 3.0 liters total water study, including water from food makes hitting the daily target more achievable than relying on drinks alone.

Dark yellow or strong-smelling urine is one of the earliest red flags. If you notice it, reaching for water is a good first step. Persistent fatigue or dizziness that doesn’t resolve with hydration may warrant a call to your obstetrician, especially if it’s paired with reduced urination.

Individual variation matters here. Some women naturally have lighter or darker urine depending on prenatal vitamins and diet. The overall pattern across a day is a more reliable guide than a single moment.

The Bottom Line

The recommended daily water intake during pregnancy falls between 64 and 96 ounces, or 8 to 12 cups. This range supports increased blood volume, amniotic fluid production, and digestion. Using urine color as a daily check and spreading fluids across meals are two practical ways to stay on track without obsessing over exact measurements.

Every pregnancy has its own fluid needs. If you have a condition like preeclampsia or kidney concerns, or if you’re simply struggling to keep fluids down, your obstetrician or midwife can help you adjust your water target to a safe level for you and your baby.