More Definitions for amnion. Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free! Log in Sign Up. Save Word. Definition of amnion. Examples of amnion in a Sentence Recent Examples on the Web Birds, mammals and reptiles called amniotes produce eggs that include an amnion , or inner membrane, that keeps the embryo inside from drying out.
First Known Use of amnion , in the meaning defined at sense 1. History and Etymology for amnion New Latin, from Greek, caul, from amnos lamb — more at yean. Learn More About amnion. Time Traveler for amnion The first known use of amnion was in See more words from the same year. Statistics for amnion Look-up Popularity. This level decreases as birth nears. When the waters break, the amniotic sac tears. The amniotic fluid contained within the sac then begins to leak out via the cervix and vagina.
The waters usually break toward the end of the first stage of labor. When this happens, it is time to contact the health provider as delivery may be imminent. Polyhydramnios, also referred to as hydramnios or amniotic fluid disorder, is when there is too much fluid. Low levels of amniotic fluid, referred to as oligohydramnios, occur in 4 percent of all pregnancies and 12 percent of post-date pregnancies. Oligohydramnios is present when the amniotic fluid index AFI seen on ultrasound measures less than 5 cm a normal index is cm and the maximum vertical pocket MVP is less than 2 cm.
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. It may also occur in mothers with a history of any of the following medical conditions:.
Oligohydramnios can happen during any trimester but is a more concerning problem during the first 6 months of pregnancy. During that time, there is a higher risk of birth defects, loss of pregnancy, preterm birth, or neonatal loss of life. The rest of the pregnancy will be monitored closely to ensure normal development is taking place. In some cases, doctors may decide that labor will need to be induced, in order to protect the mother or the child.
Amnioinfusion the infusion of saline into the uterus , increasing maternal fluids, and bed rest may also be necessary. There is a higher chance of labor complications, due to the risk of umbilical cord compression. Amnioinfusion may be needed during labor. In some cases, a cesarian delivery may be necessary.
When there is too much amniotic fluid, this is called polyhydramnios. According to the American Pregnancy Association, it occurs in 1 percent of all pregnancies. Too much fluid can also be produced during multiple pregnancies, when the mother is carrying more than one fetus. Maternal symptoms can include abdominal pain and difficulty breathing due to the enlargement of the uterus. Testing for maternal diabetes may be recommended, and frequent ultrasounds will be obtained to monitor the levels of amniotic fluid in the uterus.
In more severe cases, fluid may need to be reduced with either amniocentesis or a medication called indomethacin. This reduces the amount of urine the baby produces.
Sometimes, fluid leaks before the waters break. According to the American Pregnancy Association, only 1 in 10 women will experience a dramatic flow of fluid as the waters break.
Pay attention during your ultrasounds — these will help you understand your amniotic fluid levels. So, now what? Later-stage pregnancies that experience low amniotic fluid can cause complications during labor and birth and an increased chance of birth by c-section and are most often treated through the delivery of your baby. Doctors may also recommend alternative treatments, like fluid injections or amnio-infusions via an intrauterine catheter.
Moms, consult with your physician to get help in providing the best care for your baby. Intermountain Healthcare is a Utah-based, not-for-profit system of 24 hospitals includes "virtual" hospital , a Medical Group with more than 2, physicians and advanced practice clinicians at about clinics, a health plans division called SelectHealth, and other health services. Helping people live the healthiest lives possible, Intermountain is widely recognized as a leader in clinical quality improvement and efficient healthcare delivery.
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