During that time, there is a higher risk of birth defects, loss of pregnancy, preterm birth, or neonatal loss of life. Oligohydramnios can happen during any trimester but is a more concerning problem during the first 6 months of pregnancy. other unknown reasons, known as idiopathic.birth defects, such as kidney abnormalities.multiple pregnancies, for example twins or triplets.problems with the placenta, for example, abruption.chronic high blood pressure (hypertension).It may also occur in mothers with a history of any of the following medical conditions: This may be evident in cases of leaking fluid from a tear in the amniotic membranes, measuring small for a certain stage of pregnancy or if the fetus is not moving as much as it would be expected to. Oligohydramnios is present when the amniotic fluid index (AFI) seen on ultrasound measures less than 5 cm (a normal index is 5-25cm) and the maximum vertical pocket (MVP) is less than 2 cm. Low levels of amniotic fluid, referred to as oligohydramnios, occur in 4 percent of all pregnancies and 12 percent of post-date pregnancies. Polyhydramnios, also referred to as hydramnios or amniotic fluid disorder, is when there is too much fluid. Oligohydramnios is when there is too little amniotic fluid. Some conditions can cause there to be more or less than the normal amounts of amniotic fluid. When this happens, it is time to contact the health provider as delivery may be imminent. According to Today’s Parent, only about 15 percent of waters break upon the onset of labor. The waters usually break toward the end of the first stage of labor. The amniotic fluid contained within the sac then begins to leak out via the cervix and vagina. When the waters break, the amniotic sac tears. Normally, the level of amniotic fluid is at its highest around 36 of pregnancy, measuring around 1 quart. This cord transports food and oxygen from the placenta to the growing fetus. Umbilical cord support: Fluid in the uterus prevents the umbilical cord from being compressed.Lubrication Amniotic fluid prevents parts of the body such as the fingers and toes from growing together webbing can occur if amniotic fluid levels are low.Muscle and bone development: As the baby floats inside the amniotic sac, it has the freedom to move about, giving muscles and bones the opportunity to develop properly.Lung and digestive system development: By breathing and swallowing the amniotic fluid, the baby practices using the muscles of these systems as they grow.Infection control: The amniotic fluid contains antibodies.Temperature control: The fluid insulates the baby, keeping it warm and maintaining a regular temperature.Protecting the fetus: The fluid cushions the baby from outside pressures, acting as a shock absorber. Ruptured membranes: When the bag of water breaks.conditions-diseases/premature-rupture-membranes-prompreterm-premature-rupture-membranes-pprom Premature rupture of membranes (PROM)/preterm premature rupture of membranes (PPROM).clinical/clinical-guidance/committee-opinion/articles/2016/11/immersion-in-water-during-labor-and-delivery Immersion in water during labor and delivery.womens-health/faqs/how-to-tell-when-labor-begins Contemporary diagnosis and management of preterm premature rupture of membranes. You can learn more about how we ensure our content is accurate and current by reading our editorial policy. Healthline has strict sourcing guidelines and relies on peer-reviewed studies, academic research institutions, and medical associations.
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