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

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.

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 ?
Amnicell collects, stores and processes the amniotic fluid and the stem cells for use in areas of unmet medical need and commercial areas, such as hair and skin care.
The amniotic membrane was donated by a mother who delivered a baby via C-section at the Latifa Hospital for women and children.
The human amniotic tissues in ReNu contain cellular components, growth factors, and extracellular matrix, and are naturally rich in anti-inflammatory growth factors.
Noah's birth was an example of what was known as the en-caul birth, which meant that a portion of the amniotic sac or a thin, filmy membrane remained on the child's head at birth.
Conclusion: Thick Meconium stained amniotic fluid was associated with low APGAR score, high rate of emergency cesarean section and meconium aspiration syndrome.
Practically, in several cases, there are conflicting results between colour Doppler sonography and gray-scale sonography in measurement of amniotic fluid volume, that is, colour Doppler reports a lower or normal range for amniotic fluid volume, but the gray-scale sonography shows significantly higher ranges for the same amniotic fluid volume.
The research history of amniotic fluid stem cells can be traced back to the beginning of the 20th century.
During the first five months the baby's skin allows its bodily fluids to pass freely in and out of the surrounding fluid, so the baby and the amniotic fluid are one.
The presence of amniotic fluid stained with meconium is a subject of importance when considering intrapartum management.
The aim of this study was to test human amniotic membrane as a potential therapeutic tool against cholestatic liver fibrosis in young rats.