BACK TOTOP Browse A-ZSearchBrowse A-ZABCDEFGHIJKLMNOPQRSTUVWXYZ0-9 E-mail FormEmail ResultsName:Email address:Recipients Name:Recipients address:Message: Print-FriendlyBookmarksbookmarks-menuPolyhydramniosPregnancy - polyhydramnios; Hydramnios - polyhydramniosPolyhydramnios occurs when too much amniotic fluid builds up during pregnancy. It is also called amniotic fluid disorder, or hydramnios. Considerations Amniotic fluid is the liquid that surrounds the baby in the womb (uterus). It comes from the baby's kidneys, and it goes into the uterus from the baby's urine. The fluid is absorbed when the baby swallows it and through breathing motions.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.The amniotic fluid:Allows baby to move in the womb, promoting muscle and bone growth Helps baby's lungs to develop Protects the baby from heat loss by keeping the temperature constant Cushions and protects the baby from sudden blows from outside the womb Causes 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:Gastrointestinal disorders, such as duodenal atresia, esophageal atresia, gastroschisis, and diaphragmatic hernia Duodenal atresiaDuodenal atresia is a condition in which the first part of the small bowel (the duodenum) has not developed properly. It is not open and cannot allo...ImageRead Article Now Book Mark Article Esophageal atresiaEsophageal atresia is a birth defect in which the esophagus does not develop properly. The esophagus is the tube that normally carries food from the...Read Article Now Book Mark Article GastroschisisGastroschisis is a birth defect in which an infant's intestines are outside of the body because of a hole in the abdominal wall.ImageRead Article Now Book Mark Article Diaphragmatic herniaA diaphragmatic hernia is a birth defect in which there is an abnormal opening in the diaphragm. The diaphragm is the muscle between the chest and a...ImageRead Article Now Book Mark Article Brain and nervous system problems, such as anencephaly and myotonic dystrophy AnencephalyAnencephaly is the absence of a large part of the brain and the skull.ImageRead Article Now Book Mark Article Achondroplasia AchondroplasiaAchondroplasia is a disorder of bone growth that causes the most common type of dwarfism.Read Article Now Book Mark Article Beckwith-Wiedemann syndromeBeckwith-Wiedemann syndromeBeckwith-Wiedemann syndrome is a growth disorder that causes large body size, large organs, and other symptoms. It is a congenital condition, which ...ImageRead Article Now Book Mark Article It can also happen if the mother has poorly controlled diabetes.Polyhydramnios also may occur if too much fluid is produced. This may be due to:Certain lung disorders in the baby Multiple pregnancy (for example, twins or triplets) Hydrops fetalis in the babyHydrops fetalisHydrops fetalis is a serious condition. It occurs when abnormal amounts of fluid build up in two or more body areas of a fetus or newborn. It is a ...ImageRead Article Now Book Mark Article Sometimes, no specific cause is found. When to Contact a Medical Professional Call your health care provider if you are pregnant and notice that your belly is getting large very quickly. What to Expect at Your Office Visit 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 gestational age, the provider may:Gestational ageGestation is the period of time between conception and birth. During this time, the baby grows and develops inside the mother's womb. Gestational ag...Read Article Now Book Mark Article Have you come back sooner than normal to check it again Do an ultrasoundIf your provider finds a birth defect, you may need amniocentesis to test for a genetic defect.AmniocentesisAmniocentesis is a test that can be done during pregnancy to look for certain problems in the developing baby. These problems include:Birth defectsG...ImageRead Article Now Book Mark Article Mild polyhydramnios that shows up later in pregnancy often doesn't cause serious problems.Severe polyhydramnios may be treated with medicine or by having extra fluid removed.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.Open ReferencesReferencesBuhimschi CS, Mesiano S, Muglia LJ. Pathogenesis of spontaneous preterm birth. In: Resnik R, Lockwood CJ, Moore TR, Greene MF, Copel JA, Silver RM, eds. Creasy and Resnik's Maternal-Fetal Medicine: Principles and Practice. 8th ed. Philadelphia, PA: Elsevier; 2019:chap 7.Gilbert WM. Amniotic fluid disorders. In: Landon MB, Galan HL, Jauniaux ERM, et al, eds. Gabbe's Obstetrics: Normal and Problem Pregnancies. 8th ed. Philadelphia, PA: Elsevier; 2021:chap 28.Suhrie KR, Tabbah SM. The fetus. In: Kliegman RM, St. Geme JW, Blum NJ, Shah SS, Tasker RC, Wilson KM, eds. Nelson Textbook of Pediatrics. 21st ed. Philadelphia, PA: Elsevier; 2020:chap 115.AllVideoImagesTogPolyhydramnios - illustration Polyhydramnios may occur when a fetus cannot swallow a normal amount of amniotic fluid due to a gastrointestinal, neurological, or other problem. PolyhydramniosillustrationPolyhydramnios - illustration Polyhydramnios may occur when a fetus cannot swallow a normal amount of amniotic fluid due to a gastrointestinal, neurological, or other problem. PolyhydramniosillustrationRelated Information Amniotic fluid(Special Topic) Review Date: 5/24/2021 Reviewed By: Neil K. Kaneshiro, MD, MHA, Clinical Professor of Pediatrics, University of Washington School of Medicine, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team. The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- © 1997- All rights reserved. A.D.A.M. content is best viewed in IE9 or above, Firefox and Google Chrome browser.Content is best viewed in IE9 or above, Firefox and Google Chrome browser.