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Topic: Amniotic sac

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	Information on Amniotic Fluid (Amniocentesis) - Medicine Online Medical Encyclopedia (Site not responding. Last check: 2007-10-13)
		Amniocentesis is a procedure whereby fluid is extracted from the amniotic sac.
		The amniotic sac is the fluid-filled structure inside the pregnant uterus within which the baby lives.
		Once the needle is in the sac, a syringe is used to withdraw the clear amber-colored amniotic fluid, resembling urine.
	www.medicineonline.com /encyclopedia/A/Amniotic-Fluid-Amniocentesis (1689 words)

	* Amniotic sac - (Pregnancy & Parenting): Definition (Site not responding. Last check: 2007-10-13)
		The sac is filled with amniotic fluid - liquid made by the fetus and the amnion (the membrane that covers the fetal side of the placenta) which protects the fetus from injury...
		Amniotic sac: The bag in which the fetus and amniotic fluid are contained during pregnancy.
		It requires that the amniotic sac be broken spontaneously, or by the midwife or doctor, and that the women be at least 2 cm to 3 cm dilated.
	www.en.mimi.hu /pregnancy/amniotic_sac.html (1323 words)

	Amniotic sac - Biocrawler (Site not responding. Last check: 2007-10-13)
		The amniotic sac is a tough but thin transparent pair of membranes, which hold a developing embryo (and later fetus) until shortly before birth.
		Amniotic fluid is the watery liquid surrounding and cushioning a growing fetus within the amnion.
		A rare and often fatal obstetric complication is an amniotic fluid embolism, which causes Disseminated intravascular coagulation.
	www.biocrawler.com /encyclopedia/Amnion (537 words)

	Lancaster General Hospital - Amniotic Fluid Problems / Hydramnios /Oligohydramn (Site not responding. Last check: 2007-10-13)
		This watery fluid is inside a casing called the amniotic membrane (or sac) and fluid surrounds the fetus throughout pregnancy.
		Amniotic fluid helps protect and cushion the fetus and plays an important role in the development of many of the fetal organs including the lungs, kidneys, and gastrointestinal tract.
		When the amniotic sac ruptures, large amounts of fluid leaving the uterus may increase the risk of placental abruption (early detachment of the placenta) or umbilical cord prolapse (when the cord falls down through the cervical opening) where it may be compressed.
	www.lancastergeneral.com /content/greystone_22602.asp (820 words)

	Twin to Twin Transfusion Syndrome (TTTS)
		Amniotic fluid volume is measured with ultrasound by determining the deepest pocket measurement from the patient’s skin to her back.
		Serial amniocentesis involves the removal of the excessive amniotic fluid from the sac of the recipient twin using a needle that is passed through the maternal abdomen.
		Septostomy is the creation of a hole in the membrane between the babies’ sacs using a needle. This causes fluid to move from the amniotic sac with excessive fluid (the recipient’s sac) into the sac with absent or low fluid (donor’s sac).
	www.mombaby.org /UserFiles/File/TTTS.html (4060 words)

	Amniotic Bands
		Amniotic bands is an abnormal condition of fetal development in which fibrous bands of tissue that originate from the amniotic sac encircle and constrict certain fetal areas, disrupting fetal growth.
		Amniotic band formation may be associated with early rupture of the amniotic membrane, chronic leakage and abnormally decreased levels of the fluid surrounding the developing fetus (oligohydramnios), and abnormally decreased fetal movements.
		This absence of fetal kidneys is the primary cause of the deficiency of amniotic fluid (Oligohydramnios) in the pregnant mother.
	hw.healthdialog.com /kbase/nord/nord711.htm (1375 words)

	Too little amniotic fluid: iVillage
		Amniotic fluid is usually sterile, and contained in the sac that surrounds your baby throughout pregnancy.
		The fluid is produced by the inner lining of the sac (amnion) as well as a contribution from your baby's lungs and kidneys - it is continually taken up by the baby's swallowing, and is also sent across the afterbirth (placenta) into your own circulation.
		As amniotic fluid is very important in the development of various organs in your baby - especially the lungs - too little fluid, especially for long periods of time, may cause these organs to develop abnormally or incompletely.
	www.ivillage.co.uk /print/0,,184307,00.html (739 words)

	Amniotic Band Syndrome: Learn More
		Amniotic band syndrome is a rare condition caused by strands of the amniotic sac that separate and entangle digits, limbs, or other parts of the fetus.
		This sac has 2 layers which are stuck together: the outermost layer which lines the uterus is called the "chorion", and the layer closer to the fetus is called the "amnion".
		Amniotic bands can be difficult to detect by ultrasound because of their small size, so it is important to have your case reviewed by someone knowledgeable in amniotic band syndrome.
	fetus.ucsfmedicalcenter.org /amniotic/learn_more.asp (611 words)

	High-Risk Pregnancy - Amniotic Fluid Problems / Hydramnios /Oligohydramnios
		Amniotic fluid is an important part of pregnancy and fetal development.
		This watery fluid is inside a casing called the amniotic membrane (or sac) and fluid surrounds the fetus throughout pregnancy.
		Amniotic fluid helps protect and cushion the fetus and plays an important role in the development of many of the fetal organs including the lungs, kidneys, and gastrointestinal tract.
	www.musckids.com /health_library/hrpregnant/amniofp.htm (807 words)

	Amniotic sac Summary
		The amniotic sac is a tough but thin transparent pair of membranes, which hold a developing embryo (and later fetus) until shortly before birth.
		Amniotic fluid is the watery liquid surrounding and cushioning a growing fetus within the amnion.
		A rare and often fatal obstetric complication is an amniotic fluid embolism, which causes Disseminated intravascular coagulation.
	www.bookrags.com /Amniotic_sac (1011 words)

	Centegra Health System - Amniotic Fluid Problems / Hydramnios /Oligohydramnios
		Too much amniotic fluid can cause the mother's uterus to become overdistended and may lead to preterm labor or premature rupture of membranes (the amniotic sac).
		When the amniotic sac ruptures, large amounts of fluid leaving the uterus may increase the risk of placental abruption (early detachment of the placenta) or umbilical cord prolapse (when the cord falls down through the cervical opening) where it may be compressed.
		Amniotic fluid is important in the development of fetal organs, especially the lungs.
	www.centegra.org /Content.asp?PageID=P02430 (827 words)

	Amniotic fluid Information on Healthline
		Amniotic fluid is a clear, slightly yellowish liquid that surrounds the unborn baby (fetus) during pregnancy.
		Amniotic fluid volume is greatest at approximately 34 weeks of gestation, when it averages 800 ml.
		An abnormally small amount of amniotic fluid is known as oligohydramnios.
	www.healthline.com /adamcontent/amniotic-fluid (255 words)

	Amniotic Fluid Leakage Tests FAQs
		Amniotic fluid is a colourless fluid that surrounds the baby in your uterus.
		Amniotic fluid also plays a vital role in the development of internal organs, such as the lungs and kidneys.
		In amniocentesis, a sample of the amniotic fluid that surrounds the foetus is removed and analysed.
	www.simplicityhealth.co.uk /Popup_FAQs/Amniosense_FAQs.htm (1167 words)

	Amniotic Fluid \| Pregnancy Weekly
		Amniotic fluid is a colorless liquid made of water, fetal skin cells, and fetal waste, and is contained within the amniotic sac or "bag of waters" that surrounds your baby.
		An excessive amount of amniotic fluid is called polyhydramnios, and is often associated with a multiple pregnancy (twins or triplets), congenital anomalies, or gestational diabetes.
		An abnormally small amount of amniotic fluid is known as oligohydramnios, and may the result of a postdate pregnancy, ruptured membranes, placental dysfunction, or fetal abnormalities.
	www.pregnancyweekly.com /pregnancy_information/amniotic_fluid.htm (480 words)

	Amniotic sac - Wikipedia, the free encyclopedia
		When in the light, the amniotic sac is shiny and very smooth, but too tough to pierce through.
		Amniotic fluid is primarily produced by the mother until 16 weeks of gestation.
		Preterm premature rupture of membranes (PPROM) is a condition where the amniotic sac leaks fluid before 38 weeks of gestation.
	en.wikipedia.org /wiki/Amniotic_sac (816 words)

	TheFetus.net - Amniotic band syndrome -Luís Flávio Gonçalves, MD, Philippe Jeanty, MD, PhD
		Definition: Amniotic band syndrome is a set of congenital malformations ranging from minor constriction rings and lymphedema of the digits to complex, bizarre multiple congenital anomalies that are attributed to amniotic bands that stick, entangle and disrupt fetal parts.
		While viewing the interior of the distended fetal sac it was seen that the amnion was in the form of an open, globular pocket surrounding the placental attachment of the umbilical cord.
		Amniotic folds are recognized by prenatal ultrasonography as reflecting membranes floating freely in the amniotic fluid.
	www.thefetus.net /page.php?id=405 (2528 words)

	University of Missouri Children's Hospital \| Pediatric Plastic Surgery
		In amniotic band syndrome, strands of the amniotic sac ensnare parts of the developing body, causing a variety of problems.
		For example, it may cause only a minor groove or indentation in one of the limbs; or it may cause syndactyly of multiple digits on the hand or foot with multiple bands or constriction rings on multiple digits; or amputations of digits or larger parts of the limbs.
		The primary issue in most types of amniotic band syndrome is function of the hand and digits; appearance of the hand is also an issue, but is secondary to function.
	www.surgery.missouri.edu /peds/conditions/amniotic_band.php (792 words)

	Pioneering surgery seals ruptured birth sac
		The fluid in the birth sac is necessary for the lungs to develop.
		The premature rupture of the amniotic sac surrounding a fetus is one of the primary causes of preterm delivery and is responsible for about 40% of preterm births.
		The day after the operation, the amniotic fluid index, a measure of the amount of fluid in the birth sac, was 8, which is normal, and no fluid was leaking from her vagina, said Dr. Young.
	www.eurekalert.org /pub_releases/2001-01/NYUM-Pssr-2201101.php (822 words)

	Amniotic Fluid/Bag of Water
		Amniotic fluid is a clear odorless liquid, which surrounds and protects the baby in the uterus and provides a protective barrier from the outside environment.
		The amniotic fluid, or bag of waters, surrounds and protects the baby in the uterus and provides a protective barrier from the outside environment.
		If the amniotic fluid is green, brownish-yellow, or anything other than clear in color, notify your physician or midwife and come to the hospital as soon as possible.
	babies.sutterhealth.org /laboranddelivery/ld_am-flu.html (419 words)

	UNSW Embryology- Beginnings, Growth and Development - Placenta-fetal membranes
		Note: amniotic sac (relatively tense), yolk sac (less tense), head fold region, region of heart tube ventral to the head fold, and the somites.
		The embryo lies between the yolk sac fluid and the amniotic sac fluid.
		The broad elevation in the ectoderm is the expansion dome (primitive single brain bulge) and the cluster of cells at the caudal end of the embryonic disc is the primitive node region.
	embryology.med.unsw.edu.au /Medicine/BGDlab8.htm (913 words)

	empty amniotic sac (empty amniotc sac) information. (Site not responding. Last check: 2007-10-13)
		It follows that by the time an amniotic sac is detectable sonographically..
		A blighted ovum refers to the situation in one particular type of miscarriage, where the amniotic sac is empty - ie although the woman is, or has been,..
		Her baby's amniotic sac had torn and some of it leaked into her blood supply.
	www.diffidentspectator.com /e/empty_amniotic_sac.html (269 words)

	Recognizing Intraamniotic Band-like Structures on OB Ultrasound
		Band-like structures within the gestational sac are frequently noted on obstetric sonograms during the first and second trimester of pregnancy.
		Entanglement of the fetus in the amniotic bands may occur which results in a range of abnormalities ranging from band constriction to full amputation of limbs, dissection of abdomen, or cranium, and other bizarre anomalies.
		Amniotic band syndrome is a very rare condition, however, is associated with the poorest outcome due to the potential for development of severe anatomic abnormalities.
	www.obgyn.net /us/cotm/9909/Bands.htm (1277 words)

	Amnion - Wikipedia, the free encyclopedia
		This cavity is roofed in by a single stratum of flattened, ectodermal cells, the amniotic ectoderm, and its floor consists of the prismatic ectoderm of the embryonic disk—the continuity between the roof and floor being established at the margin of the embryonic disk.
		Outside the amniotic ectoderm is a thin layer of mesoderm, which is continuous with that of the somatopleure and is connected by the body-stalk with the mesodermal lining of the chorion.
		This, the amniotic fold, first makes its appearance at the cephalic extremity, and subsequently at the caudal end and sides of the embryo, and gradually rising more and more, its different parts meet and fuse over the dorsal aspect of the embryo, and enclose a cavity, the amniotic cavity.
	en.wikipedia.org /wiki/Amnion (643 words)

	High Amniotic Fluid Levels ; Polyhydramnios : American Pregnancy Association
		The amniotic fluid is part of the baby’s life support system.
		Amniotic fluid is produced soon after the amniotic sac forms, about 12 days after conception.
		Amniotic fluid levels increase regularly until about 32-33 weeks gestation, and then they level off.
	www.americanpregnancy.org /pregnancycomplications/highamnioticfluidpolyhydramnios.htm (762 words)

	Evolution of the Amniotic Sac and Extracelomic Space as Seen by Early Ultrasound Examination - Karger Publishers
		Objective: Amniotic sac and extracelomic space changes occurring from 5 to 14 weeks of pregnancy were observed with transvaginal ultrasound to gain new insights into their normal relationships during this time period.
		The embryo, amniotic sac, and gestational sac areas were measured using the best-fitted computer-generated elliptical view.
		Conclusion: These data describe the normal relationships between the embryonic, amniotic sac, extracelomic space, and gestational sac surface, suggesting that increases in embryonic surface area is a determining factor for early expansion of the amniotic sac at these gestational ages.
	content.karger.com /ProdukteDB/produkte.asp?Doi=70807 (344 words)

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