what is amniotic fluid index in pregnancy?
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The amniotic fluid index (AFI) is an estimate of the amniotic fluid volume in a pregnant uterus. It is part of the fetal biophysical profile.
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They do not grow as much in length and put on approximately 230 grams per week (about an ounce a day). Also, the amount of amniotic fluid around your baby slightly decreases from around 37 weeks. Want to join the family?
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Symptoms of low amniotic fluid when you're pregnant Your uterus measures small for gestational age. You're not gaining enough pregnancy weight. Your baby's heart rate suddenly drops.
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The fluid (known as amniotic fluid) is a clear or pinkish colour. Sometimes the fluid may be a green-brown colour or slightly blood-stained. The amount of fluid you lose may vary from a trickle to a gush.
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Your doctor can measure your amniotic fluid levels using an ultrasound. There are two calculations on ways to measure, known as the amniotic fluid index (AFI) or the maximum vertical pocket (MPV). Doctors consider your fluid levels to be low if your AFI is less than 5 centimeters (cm) or your MPV is less than 2 cm.
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Leaking amniotic fluid might feel like a gush of warm fluid or a slow trickle from the vagina. It will usually be clear and odorless but may sometimes contain traces of blood or mucus. If the liquid is amniotic fluid, it is unlikely to stop leaking.
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Amniocentesis is performed between 16 and 20 weeks into the pregnancy. By around this time, the developing baby is suspended in about 130ml of amniotic fluid, which the baby constantly swallows and excretes. A thin needle is used to withdraw a small amount of this fluid from the sac surrounding the fetus.
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Symptoms of low amniotic fluid when you're pregnant You're not gaining enough pregnancy weight. Your baby's heart rate suddenly drops. You have a decreased amount of amniotic fluid, which is detected via ultrasound.
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Various factors can contribute to low amniotic fluid in pregnancy, including: Your water breaking. The placenta peeling away from the inner wall of the uterus — either partially or completely — before delivery (placental abruption) Certain health conditions in the mother, such as chronic high blood pressure.
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After 23 weeks your baby does not need the amniotic fluid so much, so low levels of fluid may not be a problem in itself, but if the low levels are due to your waters breaking then there is a risk of infection. If you are under 24 weeks of pregnancy and the baby is born, sadly, it is unlikely the baby will survive.
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The amount of amniotic fluid begins to decline around 37 weeks. Braxton Hicks contractions also increase in frequency. As your body begins to prepare for labor, your cervix will begin to dilate and efface.
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Symptoms of low amniotic fluid when you're pregnant If you have low amniotic fluid, your doctor may note: Your uterus measures small for gestational age. You're not gaining enough pregnancy weight. Your baby's heart rate suddenly drops.
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How common is leaking amniotic fluid during pregnancy? It's not all that common for your water to break before you go into labor. PROM, or leaking amniotic fluid after 37 weeks, occurs somewhere between 8 and 15 percent of pregnancies.
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Having low amniotic fluid (the medical term for this condition is oligohydramnios), indicates the amount of fluid measures lower than expected for your baby's gestational age.
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Most women diagnosed with low amniotic fluid in the third trimester will have a completely normal pregnancy. If there are very low levels of amniotic fluid for your baby to float around in, there is a slight risk of intrauterine growth restriction and umbilical cord constriction during birth.
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Causes of Amniotic Fluid Leakage The most common cause of amniotic fluid leakage is labour. However, the amniotic fluid can leak during the second trimester due to many reasons. Labour causes a spontaneous rupture of membranes (SROM) which facilitates delivery.
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You may also be more likely to have a C-section. If your doctor detects low amniotic fluid in the first or second trimesters, the risks are greater and may include miscarriage, premature birth, birth defects or stillbirth.