amniotic


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amniotic

 [am″ne-ot´ik]
pertaining to the amnion.
amniotic band syndrome a condition characterized by isolated or multiple constriction defects of the fingers, toes, limbs, and less frequently the skull, face, or viscera. It results from a tear of unknown etiology in the amnion, which allows amniotic fluid and fetal parts to escape from the amnion into the chorion. When the amnion and chorion are separated, strands from either the maternal amnion or the fetal chorion may entangle fetal parts. As the fetus grows the strands become more constrictive, causing defects.
amniotic fluid the albuminous fluid contained in the amniotic sac; called also liquor amnii and, informally, waters. The fetus floats in this fluid, which serves as a cushion against injury from sudden blows or movements and helps maintain a constant body temperature for the fetus. Normally the fluid is clear and slightly alkaline; discoloration or excessive cloudiness may indicate fetal distress or disease, as in erythroblastosis fetalis in which fluid is usually greenish yellow. The amount varies from 500 to 1500 ml.

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.

am·ni·on·ic

(am'nē-on'ik),
Relating to the amnion.
Synonym(s): amniotic

amniotic

/am·ni·ot·ic/ (am″ne-ot´ik) pertaining to or developing an amnion.

amniotic

See amnion.

amniotic

adjective Referring to or derived from the amnion.

amniotic

Pertaining to the AMNION.

am·ni·on·ic

(am'nē-on'ik)
Relating to the amnion.
Synonym(s): amniotic.

amniotic

pertaining to the amnion.

amniotic fluid
the albuminous fluid contained in the amniotic sac.
amniotic plaque
small, 2 to 4 mm diameter, poxlike lesion on the inside of the amnion. Constant on the bovine amnion during the middle trimester and causes no problems nor has any known function.
amniotic sac
the amnion; the sac enclosing the fetus suspended in the amniotic fluid.
amniotic vesicle
see amniotic sac (above). Palpation of the vesicle per rectum in the cow is a common test for pregnancy between the 35th and 65th day of pregnancy.

Patient discussion about amniotic

Q. what does it mean when an ultrasound shows an empty amniotic sac and no baby?

A. This exact thing happened with my friend who is now 22 weeks with her first baby. She had 2 additional sacs - both empty - and the doctor said that the pregnancy had probably started out as triplets but that only one of the embryos had actually established and continued to grow.

Her doctor said it is very common for a woman to have more than one egg fertilize but that in most cases the pregnancy continues as a singleton only. She told my friend that the empty sacs would just disappear through time (which they did) and that they posed no danger to her baby.

More discussions about amniotic
References in periodicals archive ?
Using the device, clinicians can collect up to a liter of amniotic fluid at full-term caesarean deliveries.
We showed that using our device, we can collect up to a litre of amniotic fluid at full-term caesarean deliveries.
This was "definitive evidence" of Amniotic Fluid Infusion Syndrome, he said, which is "unpredictable and unpreventable" and very rare.
Still, to reach the fetus, the instruments must penetrate the amniotic sac, which cannot heal or easily be sewn shut because it is so fragile.
Infants born through Meconium-stained amniotic fluid (MSAF) are more likely to develop respiratory distress compared to their counterparts born through clear amniotic fluid [5].
Both products have yielded positive early clinical feedback and are groundbreaking advancements in the $426 million amniotic tissue market.
There is a need to match IOF supplements to the properties of the amniotic fluid of late-incubation egg, into which these supplements are usually delivered.
Conclusion: Amniotic membrane grafting was found to be a safe procedure for ocular surface disorders.
The fetal lambs were grown in a temperature-controlled, near-sterile environment, breathing amniotic fluid as they normally do inside a natural womb.
PARENTS' CLAIM: The ObGyns should have continued weekly tests even after the amniotic fluid level returned to normal.
Their amniotic and chorionic fetal tissues were manually peeled in sterile conditions.
Those balloons cause inflammation and weaken the amniotic sac, researchers report September 1 in PLOS Pathogens.