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60-501: EIF may refer to: Science and medicine [ edit ] Echogenic intracardiac focus Eukaryotic initiation factor Exponential integrate-and-fire Sport [ edit ] Edsbyns IF , a Swedish bandy club Ekenäs IF , a Finnish football club Eskilsminne IF , Swedish football club Other uses [ edit ] Easter Island Foundation , an American conservation organization Eclaireurs israélites de France ,

120-424: A French Scouting organization Edinburgh International Festival , a Scottish performing arts festival Empirical influence function Enhanced integrated framework , a global development program Enterprise interoperability framework Entertainment Industry Foundation , an American entertainment industry charity European industry federation , a type of trade union European Internet Foundation of

180-413: A chromosome problem in the baby. Types of chromosome problems that are occasionally seen include trisomy 13 ( Patau syndrome ) or trisomy 21 ( Down syndrome ). In the case of an isolated EIF, and no other ultrasound findings, some studies show that the risk for a chromosome abnormality is approximately two times a woman's background risk. Other studies report up to a 1% risk for Down syndrome when an EIF

240-483: A condition known as Rhesus disease or hemolytic disease of the fetus and newborn. Maternal blood type is assessed prior to undergoing amniocentesis and RhD immune globulin (RhoGam) is typically administered within 72 hours of the procedure to prevent maternal Rh sensitization in RhD negative patients that are non-sensitized to RhD antigens. Amniotic fluid embolism, a condition in which amniotic fluid or other fetal debris enters

300-718: A consequence of bleeding, infection, or trauma to the fetus or the amniotic sac as a result of the procedure. Studies from 2000 to 2006 estimated the procedure-related pregnancy loss at 0.6-0.86%. The most recent systematic review of the literature and updated meta-analysis on the risk of pregnancy loss following amniocentesis was published in 2019. This study cites the amniocentesis-related pregnancy loss to be 0.30% (95% CI, 0.11–0.49%). The incidence of amniocentesis-related complications, including pregnancy loss and procedure failure, may be mitigated when performed by experienced practitioners who complete 100 or more amniocenteses per year. Experienced practitioners are more likely to complete

360-431: A family or suspected based on fetal ultrasound findings, such as sickle cell disease , Tay–Sachs disease , neurofibromatosis , and cystic fibrosis . Amniocentesis has traditionally been performed to assess the extent of fetal lung development in the context of medical and obstetrical complications, with the intention of delivering the fetus if fetal lung maturity is demonstrated. Lack of fetal lung maturity increases

420-664: A fetus or destruction of an embryo. In addition, the use of embryonic cells has been shown to develop into tumors such as teratocarcinomas and frequently acquire chromosomal errors, underscoring the benefits of utilizing amniotic stem cells. Research has shown that cells from second trimester amniotic fluid are successful at differentiating into various cell lines. Artificial heart valves, working tracheas, as well as muscle, fat, bone, heart, neural and liver cells have all been engineered through use of amniotic stem cells. Tissues obtained from amniotic cell lines show significant promise for patients with congenital diseases/malformations of

480-815: A genetic disorder, prior child with a structural birth defect, previous fetus or child with autosomal trisomy or sex chromosome aneuploidy, ultrasonographic evidence of a fetus with structural abnormalities, and a high-risk genetic screening test result. Analysis of samples obtained from amniocentesis is accomplished via karyotyping and DNA analysis technology. Examples of conditions that may be detected include chromosomal abnormalities such as common aneuploidies like trisomy 13 , trisomy 18 , trisomy 21 , Turner syndrome , and Klinefelter syndrome . Micro-deletions or micro-duplications, such as DiGeorge syndrome and Cri-du-Chat syndrome , sex-linked disorders, such as hemophilia and Duchenne muscular dystrophy , and specific genetic mutations previously demonstrated to be present in

540-466: A higher risk of complications if they undergo amniocentesis and should be counseled appropriately. In some cases, the advantages of obtaining the results of an amniocentesis may outweigh the increased risk of complications. Patients on oral anticoagulation therapy have an increased risk of bleeding from the procedure and may be switched to low-molecular-weight heparin , which carries a lower risk for bleeding complications, prior to amniocentesis. There

600-439: A normal cell-free DNA test can be very reassuring and obviate the need for invasive testing. Amniocentesis is a test to check a baby's chromosomes. A small amount of amniotic fluid, which contains some fetal cells, is removed and tested. Amniocentesis is very accurate; however, there is a risk of miscarriage which occur in 0.5–1% of women who have amniocentesis. Results take about two weeks. A normal amniocentesis result means

660-471: A process in which maternal antibodies form against red blood cell Rh antigens. Events causing fetomaternal hemorrhage , such as miscarriage , trauma to the abdomen during pregnancy, ectopic pregnancy , induced abortion , invasive pregnancy procedures, labor, and birth can lead to fetal Rh positive red blood cells entering the Rh negative maternal circulation. Rh sensitization typically does not cause problems during

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720-539: A result of bacterial introduction throughout the course of the procedure. The risk of amniocentesis-related chorioamnionitis and uterine infections is less than 0.1%. Performing the procedure using sterile techniques can help prevent infection. Fetomaternal hemorrhage, or the entrance of fetal blood into the maternal circulation, is another complication of amniocentesis. It can result in anemia that can have consequences of varying severity. The procedure-related risk of fetomaternal hemorrhage attributable to amniocentesis

780-667: A result turnaround of up to three weeks. Another test that may be performed is a chromosomal microarray, which can detect chromosomal imbalances, such as small- and large-scale deletions and duplications. Chromosomal microarray can be performed on cultured or uncultured fetal tissue, with results available as early as 3 days. The American College of Obstetricians and Gynecologist recommends that patients who choose to undergo invasive diagnostic testing have access to chromosomal microarray analysis. After an amniocentesis, patients may resume their routine activity level while withholding from strenuous exercise. Some sources recommend house rest for

840-416: A result, patients with rhesus (RhD) negative blood types carrying a RhD positive fetus are at risk of Rh sensitization. Rh sensitization is a process in which maternal antibodies form against red blood cell RhD antigens. In subsequent pregnancies with RhD positive fetuses, maternal presence of these antibodies can attack and destroy fetal red blood cells, a process called Rh isoimmunization that can result in

900-495: A safe and accurate procedure. The risks and complications associated with amniocentesis include pregnancy loss, preterm labor and delivery, preterm premature rupture of membranes (PPROM), fetal injuries, Rhesus disease , and amniotic fluid embolism . Oligohydramnios, fetomaternal hemorrhage , cell culture failure, multiple amniotic fluid extraction attempts, and infections are also possible complications. Additional maternal complications include vaginal bleeding, hematoma of

960-462: A shared-decision-making process that takes into account a patient's individual risk profile and preferences. Amniocentesis may be offered to certain patients at higher risk of having a fetus with a genetic disorder. Factors that may place patients at increased risk of fetal genetic disorders include older maternal or paternal age, parental carrier of a balanced chromosomal rearrangement, parental aneuploidy or aneuploidy mosaicism , parental carrier of

1020-462: A single placenta develop significant vascular cross-connections, known as anastomoses , resulting in blood flowing away from one twin to the other. This process can result in polyhydramnios in one twin and oligohydramnios in the other twin. Amniocentesis has been employed to reduce the volume in the sac with polyhydramnios in order to relieve amniotic fluid pressures, a process that may improving fetal circulation and outcomes. Amniotic fluid, which

1080-647: Is 2.6%. Amniotic fluid cell culture after amniocentesis has a failure rate of 0.1%. Later gestational ages at the time of the procedure and amniotic fluid samples contaminated with blood increase the risk of amniocyte culture failure. While recognizing the aforementioned risks, the American College of Obstetricians and Gynecologists recommend that prenatal screening, or diagnostic testing for aneuploidy via procedures like amniocentesis or chorionic villus sampling, be discussed with and offered to all patients regardless of maternal age or risk profile. An amniocentesis

1140-454: Is administered to prevent maternal Rh sensitization in Rh negative patients that are non-sensitized to Rh antigens. In the past, serial amniocenteses has been used to monitor isoimmunized pregnancies by measuring the levels of bilirubin, a byproduct of red blood cell breakdown, present in amniotic fluid using spectrophotometry . However, ultrasound detecting middle cerebral artery peak systolic velocity has now replaced serial amniocenteses for

1200-418: Is an increased risk of mother-to-child ( vertical) transmission of bloodborne infections in patients with hepatitis B, hepatitis C, or HIV after amniocentesis. Patients with high viral loads are at a greater risk of vertical transmission of hepatitis B compared to patients with low viral loads. In patients living with HIV, amniocentesis should be deferred until a combined antiretroviral therapy (CART) regimen

1260-421: Is an inherited protein found on the surface of red blood cells. If the mother is Rh negative and the father is Rh positive, a fetus has at least a 50% chance of being Rh positive. Rh incompatibility occurs when a mother has Rh-negative blood and her baby has Rh-positive blood. If the red blood cells of an Rh positive fetus cross into their Rh negative mother's blood flow, the mother is at risk of Rh sensitization,

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1320-407: Is capable of providing a limited karyotype and, along with the aforementioned trisomies, can also detect aneuploidies in the X and Y sex chromosomes. Abnormal results from FISH studies should be confirmed with other cytogenetic testing , as false positives and negatives are possible Karyotypes are another common test performed on amniotic fluid to visualize chromosome number and characteristics, with

1380-455: Is different from Wikidata All article disambiguation pages All disambiguation pages Echogenic intracardiac focus EIFs themselves have no impact on health or heart function. Often the EIF is gone by the third trimester. If there are no problems or chromosome abnormalities, EIFs are considered normal changes, or variants. Researchers have noted an association between an EIF and

1440-442: Is easily collected, cultured, and stored through cryopreservation, can be a rich source of pluripotent and multipotent mesenchymal , hematopoietic , neural , epithelial , and endothelial stem cells . A potential benefit of using amniotic stem cells over those obtained from embryos is that they address the ethical concerns among anti-abortion activists by obtaining pluripotent lines of undifferentiated cells without harm to

1500-481: Is established and the patient achieves a low or undetectable viral load. While not a contraindication, an amniocentesis may be postponed if fusion of the amnion and chorion has not yet occurred. Performing an amniocentesis prior to the fusion of the amnion and chorion is more likely to lead to procedure failure that may require further sampling attempts. Amniocentesis performed for the purpose of prenatal diagnostic testing for genetic disorders has been established as

1560-456: Is important to remember that with an isolated EIF, chances are strongly in favor of a normal pregnancy outcome, but the patient is entitled to further counseling and testing options. Amniocentesis Amniocentesis is a medical procedure used primarily in the prenatal diagnosis of genetic conditions. It has other uses such as in the assessment of infection and fetal lung maturity. Prenatal diagnostic testing, which includes amniocentesis,

1620-412: Is intended to identify patients who are at increased risk of having a fetus with a genetic condition while prenatal genetic diagnostic testing detects whether a specific genetic condition is present in the fetus with high accuracy. Amniocentesis, along with chorionic villus sampling , are examples of prenatal diagnostic tests. Amniocentesis or chorionic villus sampling is necessary to conclusively diagnose

1680-757: Is less than the minimum expected for gestational age. Adequate amniotic fluid volumes are essential for fetal lung development. Therefore, possible consequences of oligohydramnios include infant respiratory distress and small, underdeveloped lungs known as fetal lung hypoplasia. Needle injuries to the fetus are increasingly rare due to the practice of using continuous ultrasound-guidance, including during needle insertion and amniotic fluid extraction. Reported needle injuries include cord bleeding, ocular injuries, fetal brain and cutaneous injuries, and deformities such as clubfoot. The risk of fetal injury increases with increasing number of puncture attempts. Maternal and fetal blood cells may mix during an amniocentesis and, as

1740-425: Is necessary to conclusively diagnose the majority of genetic disorders, with amniocentesis being the gold-standard procedure after 15 weeks' gestation. In this procedure, a thin needle is inserted into the abdomen of the pregnant woman. The needle punctures the amnion, which is the membrane that surrounds the developing fetus. The fluid within the amnion is called amniotic fluid , and because this fluid surrounds

1800-494: Is not a stringent indication for prompt delivery." Based on this rationale, the risks associated with amniocentesis, and the limited indications, performing amniocenteses for assessing fetal lung maturity may become obsolete except in instances where gestational age is unknown. Chorioamnionitis , or intraamniotic infection, is an infection of any combination of the amniotic fluid, placenta , fetus , fetal membranes , or decidua . The gold standard for diagnosing chorioamnionitis

1860-420: Is seen on a second trimester fetal ultrasound exam. An EIF is one clue which can contribute to the chances of a chromosome problem existing. Generally the risks are low if there are no other risk factors. Many babies with chromosome problems do not show any signs on ultrasound. Other factors are discussed in counseling include: The best available evidence suggests that an isolated echogenic intracardiac focus in

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1920-416: Is submitted for laboratory testing. Fetal viability after the procedure should be confirmed by observing adequate fetal cardiac activity. The number of needle puncture attempts should be documented. There is little scientific data supporting administration of prophylactic antibiotics prior to an amniocentesis and therefore, it is currently not recommended. Similarly, there is little scientific support for

1980-413: Is typically performed in the second trimester between the 15th and 20th week of gestation; however, it can be done at any later gestational age. It is an outpatient procedure typically performed by an obstetrician-gynecologist with additional amniocentesis training. Genetic counseling should be provided to the pregnant patient and informed consent should be obtained prior to the procedure. Prior to

2040-490: Is via a gram stain, glucose level, or culture of the amniotic fluid obtained via amniocentesis. However, in clinical practice, performing an amniocentesis for the purpose of diagnosing chorioamnionitis is rare and instead diagnosed based on clinical signs to ensure prompt treatment and avoid invasive prenatal testing. Amniocentesis can be used to detect other congenital infections such as cytomegalovirus , hepatitis B , parvovirus B19 , and toxoplasmosis . The Rh factor

2100-559: The American College of Obstetricians and Gynecologists and other similar professional associations recommend against undergoing amniocentesis prior to 14 weeks' gestation. In the past, twin pregnancies have been noted to have a higher rate of pregnancy loss (estimated at 3.07%) following amniocentesis. Past literature has shown that twin pregnancies increase the background risk of fetal loss following amniocentesis before 24 weeks' gestation by 1%. Although data on complications following amniocentesis in twin pregnancies continues to be limited,

2160-565: The American College of Obstetricians and Gynecologists note that rate of pregnancy loss due to amniocentesis in this population is estimated to be around 2%. A 2020 systematic review and meta-analysis showed similar findings, noting that pregnancy loss following amniocentesis may be lower than previously reported in twin pregnancies. The study also found no significant difference in rates of pregnancy loss between twin pregnancies that underwent amniocentesis and those that did not before 24 weeks of gestation. Maternal factors that may further increase

2220-497: The EIF is not significant and there would be no other concerns about it. That is usually done between 15 and 20 weeks of pregnancy (during the second trimester). An EIF in the fetal heart may indicate an increased chance of the baby having a chromosome problem. It does not affect the development of the baby or the function of the heart. If the baby has normal chromosomes, there would be no associated problems to be concerned about. No special treatment or tests are needed at delivery. It

2280-741: The European Parliament European Interoperability Framework European Investment Fund , an agency of the European Union Topics referred to by the same term [REDACTED] This disambiguation page lists articles associated with the title EIF . If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=EIF&oldid=838676359 " Category : Disambiguation pages Hidden categories: Short description

2340-474: The assessment of fetal lung maturity has been called into question. The Eunice Kennedy Shriver National Institute of Child Health and Human Development and the Society for Maternal-Fetal Medicine's joint statement on the matter states that "if significant maternal or fetal risks exist, delivery should occur regardless of biochemical maturity and if delivery could be deferred owing to absence of pulmonary maturity there

2400-399: The chorion and amnion should be fused. Amniocentesis is a sterile procedure, therefore medical personnel performing and assisting with the procedure will scrub with antiseptic solution, use sterile gloves, clean the maternal abdomen with antiseptic solution, cover the ultrasound probe with a sterile cover, and use sterile ultrasound gel. Ultrasound guidance is used continuously throughout

2460-452: The course of the procedure so that the needle is always visualized. A sterile 20–22 gauge spinal needle is firmly inserted perpendicular to the maternal abdomen. After puncturing the maternal abdomen, the operator punctures the uterus, gains access into amniotic cavity by puncturing the amniotic membrane while taking care not to cause membrane tenting, and proceeds to advance the needle into the amniotic cavity. The needle should be guided into

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2520-421: The developing fetus, it contains fetal cells. The amniotic fluid is sampled and analyzed via methods such as karyotyping and DNA analysis technology for genetic abnormalities. An amniocentesis is typically performed in the second trimester between the 15th and 20th week of gestation. Women who choose to have this test are primarily those at increased risk for genetic and chromosomal problems, in part because

2580-455: The fetus of an otherwise low risk woman does not confer an increased risk of fetal aneuploidy. Although some studies have reported that the number or location of echogenic foci affects the risk of fetal aneuploidy (higher risk with biventricular or right ventricular involvement), the general consensus is that these factors have not been proven to matter. When an echogenic intracardiac focus is identified in an otherwise normal second trimester fetus,

2640-609: The first pregnancy of an Rh negative woman. However, in a subsequent pregnancy with an Rh positive fetus, the formed antibodies can cross the placenta and attack the red blood cells of the fetus, a process called Rh isoimmunization that can result in a condition known as Rhesus disease or hemolytic disease of the fetus and newborn . Hemolytic disease of the fetus and newborn can lead to varying degrees of fetal anemia, which can potentially have devastating consequences including newborn jaundice , kernicterus , hydrops fetalis , and intrauterine fetal demise . RhD immune globulin (RhoGam)

2700-567: The heart, liver, lungs, kidneys, and cerebral tissue. The first amniotic stem cells bank in the US is active in Boston, Massachusetts. There are no absolute contraindications to amniocentesis. Relative contraindications to the procedure include failure to discontinue anticoagulation therapy 48–72 hours prior to amniocentesis, infections such as hepatitis B, hepatitis C , or human immunodeficiency virus (HIV) , and oligohydramnios. These patients are at

2760-498: The initial 24 hours after the procedure, though data supporting this recommendation is limited. Follow-up one week after the procedure is recommended to undergo ultrasound evaluation for fetal viability and assess healing of the puncture site. Post-procedural pain and discomfort should be minimal and temporary and may be managed with acetaminophen . Patients will be instructed to report to an emergency room if they experience vaginal bleeding or leakage of fluid, intense uterine pain, or

2820-582: The majority of genetic disorders, with amniocentesis being the gold-standard procedure after 15 weeks' gestation. Transabdominal chorionic villus sampling is an alternative to amniocentesis if genetic diagnostic testing is to be performed in the first trimester between 10 and 15 weeks' gestation. It is important to note that prenatal genetic testing cannot identify all possible fetal genetic abnormalities or their outcomes. When deciding on whether to perform invasive genetic diagnostic testing such as amniocentesis, patients and their physicians should participate in

2880-447: The management of isoimmunized pregnancies. Amniocentesis is an invasive prenatal test that has the potential to cause maternal and fetal blood cell mixing, which can worsen Rh isoimmunization. Polyhydramnios is an excessive accumulation of amniotic fluid that can lead to serious perinatal and maternal outcomes such as intrauterine fetal demise, preterm labor, premature rupture of membranes, and cesarean delivery. Physicians have used

2940-486: The maternal circulation, is an extremely rare and catastrophic complication of amniocentesis. Amniotic fluid embolism can result in cardiovascular collapse and has a poor maternal prognosis. However, amniotic fluid embolism following amniocentesis has been reported infrequently in the literature in the last 60 years, mostly in the context of case-reports. Chorioamnionitis and uterine and maternal skin infections are potential complications of amniocentesis that can occur as

3000-417: The onset of the amniocentesis, the pregnant patient will undergo ultrasound evaluation to assess fetal viability and position, gestational age, amniotic fluid volume, maximum vertical pocket, umbilical cord insertion site, and any obvious fetal deformities. This information is utilized to determine the needle used and how the procedure should be performed. The fetus should be at least 15 weeks' gestation and

3060-455: The placement of a local anesthetic prior to amniocentesis. Maternal blood type is assessed prior to undergoing amniocentesis and RhD immune globulin (RhoGam) is typically administered within 72 hours of the procedure to prevent maternal isoimmunization in RhD negative patients that are non-sensitized to RhD antigens. Amniocentesis technique differs in twin pregnancies and requires additional operator training. The two different approaches are

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3120-484: The procedure with only one puncture attempt. Multiple needle insertion attempts are associated with an increased risk of pregnancy loss. Early amniocentesis, defined as performing the procedure between 10 and 13 weeks' gestation, is associated with significantly higher rates of pregnancy loss following amniocentesis. Early amniocentesis also has higher rates of other complications, including membrane rupture, clubfoot , and amniotic fluid culture failure. For these reasons,

3180-513: The process of inserting a needle transabdominal into the uterus to extract amniotic fluid for the management of hydramnios , or excess amniotic fluid, as early as the late 1800s. Amniocentesis may be performed for both diagnostic and therapeutic reasons. The American College of Obstetricians and Gynecologists recommends that all women be offered prenatal assessment for aneuploidy by either genetic screening or diagnostic testing independent of maternal age or risk factors. Prenatal genetic screening

3240-419: The process of inserting a needle transabdominally into the uterus to extract excess amniotic fluid, also known as a reductive amniocentesis or decompression, for the management of polyhydramnios as early as the late 1800s. Reductive amniocentesis is currently indicated for severe cases of polyhydramnios only. Twin oligohydramnios-polyhydramnios sequence is a rare condition that may occur when twins sharing

3300-408: The region of the maximum vertical pocket, where the single largest area of amniotic fluid devoid of fetal parts, umbilical cord, and placenta is available for sampling. Amniotic fluid is composed of fetal cells, urine, and lung secretions. 18-20 mL of amniotic fluid is slowly aspirated, with the first 1-2 mL typically discarded due to higher risk of maternal cell contamination. The remaining sample

3360-505: The risk of infant respiratory distress syndrome . Fetal lung development can be tested by sampling the amount of surfactant in the amniotic fluid obtained via amniocentesis. Several tests are available, including the lecithin-sphingomyelin ratio (" L/S ratio "), the presence of phosphatidylglycerol (PG), and the surfactant/albumin (S/A) ratio . An L/S ratio of 2.0 is associated with a lower incidence of infant respiratory distress syndrome. The efficacy of performing amniocentesis for

3420-726: The risk of pregnancy loss following amniocentesis include: Undergoing amniocentesis in the third trimester has been associated with an increased risk of preterm labor, as defined as the onset of labor between 20 and 37 weeks' gestation, and preterm delivery. Preterm premature rupture of membranes (PPROM) and subsequent leakage of amniotic fluid are additional possible complications, with the procedure-related PPROM rate following amniocentesis estimated to be between 1–2%. When compared to cases of spontaneous PPROM, patients with amniocentesis-related PPROM experience better outcomes and lower rates of pregnancy loss. Leakage of amniotic fluid can result in oligohydramnios, or an amniotic fluid volume that

3480-675: The single-needle technique and two-needle insertion technique. If used for prenatal genetic diagnosis , fetal cells may be separated by centrifugation from the extracted sample and grown in a culture medium in order to perform genetic tests. The types of tests performed on the sample will be determined by the patient's indications for undergoing amniocentesis. Fluorescent in-situ hybridization (FISH) and quantitative fluorescence polymerase chain reaction (QF-PCR) are two tests commonly performed on uncultured cells after amniocentesis, with results available within two days. These tests can accurately identify trisomy 13, trisomy 18, and trisomy 21. FISH

3540-409: The skin, damage to surrounding internal organs, procedural pain including stinging, pressure, and cramping, and post-procedure discomfort. A serious risk of amniocentesis is pregnancy loss. The American College of Obstetricians and Gynecologists note that the pregnancy loss rates attributable to amniocentesis are very low. The mechanism for pregnancy loss following amniocentesis is unknown but may be

3600-510: The test is invasive and carries a small risk of pregnancy loss . However, the American College of Obstetricians and Gynecologists recommends that all women be offered prenatal assessment for aneuploidy , or the presence of an abnormal number of chromosomes, by either genetic screening or diagnostic testing independent of maternal age or risk factors. There are relative contraindications to performing an amniocentesis, however no absolute contraindications have been identified. Physicians have used

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