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An excessive amount of amniotic fluid (more than 2000 ml) is called hydramnios; the amount may be as much as several gallons. The cause of this condition is unknown but it frequently accompanies multiple pregnancy or some congenital defect of the fetus, especially hydrocephalus and meningocele.
An abnormally small amount of amniotic fluid is referred to as oligohydramnios; there may be less than 100 ml of fluid present. The cause is unknown. The condition may produce pressure deformities of the fetus, such as clubfoot or torticollis. Adhesions may result from direct contact of the fetus with the amnion.
Removal of a sample of amniotic fluid from the pregnant uterus is called amniocentesis.
amniotic fluidThe fluid that surrounds the foetus in the amniotic sac, which cushions it from injury and plays a central role in foetal development; osmolality, sodium, creatinine and urea content of AF and maternal serum are virtually identical.
± 800 mL at birth; specific gravity ±1.008; pH, 7.2.
Amniotic fluid analysis
• Isoimmunisation of RBCs—Bilirubin levels;
• Genetic defects—Karyotype foetal cells.
Determine foetal maturity—Creatinine, lecithin/sphingomyelin ratio, surfactant.
amniotic fluidliquor amnioticus Obstetrics The fluid that surrounds the fetus in the amniotic sac, which cushions it from injury and plays a central role in fetal development; osmolality, sodium, creatinine, and urea content of AF and maternal serum are virtually identical Volume ± 800 mL at birth; specific gravity, ±1.008; pH, 7.2
am·ni·on·ic flu·id, amniotic fluid (am'nē-on'ik flū'id, am'nē-ot'ik)
Synonym(s): liquor amnii.
amniotic fluidA liquid produced by one of the membranes which surround the fetus throughout pregnancy and by fetal urination, in which the fetus floats. The volume of amniotic fluid at full term is usually about 1 litre.
Patient discussion about Amniotic fluid
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