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</div><div><span>Polyhydramnios</span></div></div>
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<article><div id="d-article"><div class="page-info"><div class="page-title"><a name="start" id="start">
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</a><h1 class="with-also" itemprop="name">Polyhydramnios</h1>
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</noscript></div><div class="main"><div id="ency_summary"><p>Polyhydramnios occurs when too much amniotic fluid builds up during pregnancy. It is also called amniotic fluid disorder, or hydramnios.<br/></p></div><section><div class="section"><div class="section-header"><div class="section-title"><h2>Considerations</h2></div><div class="section-button"><button type="submit" aria-controls="section-1" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-1"><p>Amniotic fluid is the liquid that surrounds the baby in the womb (uterus). It comes from the baby's kidneys and developing urinary system, and then it goes into the uterus from the baby's urine. The fluid is absorbed when the baby swallows it and through breathing motions.</p><p>While in the womb, the baby floats in the amniotic fluid. It surrounds and cushions the infant during pregnancy. The amount of amniotic fluid is greatest at 34 to 36 weeks of pregnancy. Then the amount slowly decreases until the baby is born.</p><p>The amniotic fluid:</p><ul><li>Allows the baby to move in the womb, promoting muscle and bone growth</li><li>Helps the baby's lungs to develop</li><li>Protects the baby from heat loss by keeping the temperature constant</li><li>Cushions and protects the baby from sudden blows from outside the womb</li></ul></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>Causes</h2></div><div class="section-button"><button type="submit" aria-controls="section-2" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-2"><p>Polyhydramnios can occur if the baby does not swallow and absorb amniotic fluid in normal amounts. This can happen if the baby has certain health problems, including:</p><ul><li>Gastrointestinal disorders, such as <a test="test" href="./001131.htm">duodenal atresia</a>, <a test="test" href="./000961.htm">esophageal atresia</a>, <a test="test" href="./000992.htm">gastroschisis</a>, and <a test="test" href="./001135.htm">diaphragmatic hernia</a></li><li>Brain and nervous system problems, such as <a test="test" href="./001580.htm">anencephaly</a> and myotonic dystrophy</li><li><a test="test" href="./001577.htm">Achondroplasia</a></li><li><a test="test" href="./001186.htm">Beckwith-Wiedemann syndrome</a></li></ul><p>It can also happen if the mother has poorly controlled diabetes.</p><p>Polyhydramnios also may occur if too much fluid is produced. This may be due to:</p><ul><li>Certain lung disorders in the baby</li><li>Multiple pregnancy (for example, twins or triplets)</li><li><a test="test" href="./007308.htm">Hydrops fetalis</a> in the baby</li></ul><p>Sometimes, no specific cause is found.</p></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>When to Contact a Medical Professional</h2></div><div class="section-button"><button type="submit" aria-controls="section-3" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-3"><p>Contact your health care provider if you are pregnant and notice that your belly is getting large very quickly.</p></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>What to Expect at Your Office Visit</h2></div><div class="section-button"><button type="submit" aria-controls="section-4" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-4"><p>Your provider measures the size of your belly at every visit. This shows the size of your womb. If your womb is growing faster than expected, or it is larger than normal for your baby's <a test="test" href="./002367.htm">gestational age</a>, the provider may:</p><ul><li>Have you come back sooner than normal to check it again</li><li>Do an ultrasound of your womb</li></ul><p>If your provider finds a birth defect, you may need <a test="test" href="./003921.htm">amniocentesis</a> to test for a genetic defect in your baby.</p><p>Mild polyhydramnios that shows up later in pregnancy often doesn't cause serious problems.</p><p>Severe polyhydramnios may be treated with medicine or by having extra fluid removed.</p><p>Women with polyhydramnios are more likely to go into early labor. The baby will need to be delivered in a hospital. That way, the providers can immediately check the health of the mother and baby and give treatment if needed.</p></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>Alternative Names</h2></div><div class="section-button"><button type="submit" aria-controls="section-Alt" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-Alt"><p>Pregnancy - polyhydramnios; Hydramnios - polyhydramnios</p></div></div></section><section><div class="section sec-mb"><div class="section-header"><div class="section-title"><h2>Images</h2></div><div class="section-button"><button type="submit" aria-controls="section-tnails" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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<li><img src="//medlineplus.gov/ency/images/ency/tnails/17123t.jpg" alt="Polyhydramnios" title="Polyhydramnios" class="side-img"/><a href="../imagepages/17123.htm">Polyhydramnios</a></li>
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</ul></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>References</h2></div><div class="section-button"><button type="submit" aria-controls="section-Ref" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-Ref"><p>Buhimschi CS, Mesiano S, Muglia LJ. Pathogenesis of spontaneous preterm birth. In: Lockwood CJ, Copel JA, Dugoff L, eds. <em>Creasy and Resnik's Maternal-Fetal Medicine: Principles and Practice</em>. 9th ed. Philadelphia, PA: Elsevier; 2023:chap 7.</p><p>Gilbert WM. Amniotic fluid disorders. In: Landon MB, Galan HL, Jauniaux ERM, et al, eds. <em>Gabbe's Obstetrics: Normal and Problem Pregnancies</em>. 8th ed. Philadelphia, PA: Elsevier; 2021:chap 28.</p><p>Suhrie KR, Tabbah SM. The fetus. In: Kliegman RM, St. Geme JW, Blum NJ, Shah SS, Tasker RC, Wilson KM, eds. <em>Nelson Textbook of Pediatrics</em>. 21st ed. Philadelphia, PA: Elsevier; 2020:chap 115.</p></div></div></section>
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<section><div class="section"><div class="section-header"><div class="section-title"><h2>Review Date 4/25/2023</h2></div><div class="section-button"><button type="submit" aria-controls="section-version" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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<div id="section-version" class="section-body"><p>Updated by: Charles I. Schwartz, MD, FAAP, Clinical Assistant Professor of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, General Pediatrician at PennCare for Kids, Phoenixville, PA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team. </p>
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