Abstract:
:Our laboratory has received 1375 early amniotic fluid (EA) specimens during the past 5-year period for cytogenetics analysis. The gestational ages of the EA specimens were less than 14 weeks as estimated by ultrasound. The average volume of specimen received was 16 ml. Specimens were typically received in two collection tubes and cultured in Chang A and in supplemented MEM media using the in situ technique. Of the 1375 EA specimens received, 1356 were successfully cultured and yielded results. Abnormal results were found in 67 (4.9 per cent) of the cases. Nineteen specimens (1.4 per cent) failed to yield a result. The mean turn-around time (TAT) for all EA specimens was 8.28 days. In 1991, the average TAT for the EA specimens was 8.00 days compared with a TAT of 6.59 days for all specimens received over 14 weeks gestational age. The number of EA specimens received has increased from 1.5 per month in 1986 to 57 per month in 1991. In summary, our experience with EA specimens for cytogenetic analysis has demonstrated that the success rate is 98.6 per cent and that an increasing number of obstetricians are performing early amniocentesis as they seek to provide their patients with earlier results and an alternative to chorionic villus sampling.
journal_name
Prenat Diagnjournal_title
Prenatal diagnosisauthors
Lockwood DH,Neu RLdoi
10.1002/pd.1970130903subject
Has Abstractpub_date
1993-09-01 00:00:00pages
801-5issue
9eissn
0197-3851issn
1097-0223journal_volume
13pub_type
杂志文章abstract::Congenital megalourethra is a rare disorder. We present an early case diagnosed in the first trimester. Prenatal ultrasound showed a megalourethra with a normal fetal bladder, hyperechogenic cystic right kidney and single umbilical artery. After termination of pregnancy, necropsy confirmed all sonographic findings and...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/pd.328
更新日期:2002-05-01 00:00:00
abstract:OBJECTIVES:Cell-free DNA (cfDNA) screening can provide false positive/negative results because the fetal fraction originates primarily from trophoblast. Consequently, invasive diagnostic testing is recommended to confirm a high-risk result. Currently, there is debate about the most appropriate invasive method. We sough...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/pd.4659
更新日期:2015-10-01 00:00:00
abstract::The aim of this study was to determine the prenatal fetal pyelectasis which requires postnatal evaluation. This was a retrospective analysis involving 65 infants with complete urological follow-up; 59 had shown prenatal evidence of pyelectasis using previously published standards. Males were more common in both the no...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/(sici)1097-0223(199705)17:5<451::aid-pd83>
更新日期:1997-05-01 00:00:00
abstract::Trophoblast deportation is known to occur in normal human pregnancy, but it is not yet clear whether these cells routinely enter the maternal peripheral circulation and are available as a source of fetal DNA for non-invasive prenatal diagnosis of genetic disorders. To resolve this issue requires an efficient method of...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/pd.1970151007
更新日期:1995-10-01 00:00:00
abstract::A prenatal diagnosis of arthrogryposis multiplex congenita (AMC) has been carried out on a 19-week-old fetus by means of echography. The ultrasonographic characteristics were unnatural position of the four limbs associated with articular anomalies together with absence of active fetal movements. A therapeutic interrup...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/pd.1970130514
更新日期:1993-05-01 00:00:00
abstract:OBJECTIVE:To identify factors that affected the decision of pregnant women at high risk for pre-eclampsia (PE) in accepting or declining participation in a medicated clinical trial (ASPRE) for the prevention of preterm PE. METHOD:This was a qualitative, cross-sectional study. A purposive sample of 14 participants and ...
journal_title:Prenatal diagnosis
pub_type: 杂志文章,多中心研究
doi:10.1002/pd.5554
更新日期:2019-11-01 00:00:00
abstract::A 20-year-old woman with Beckwith-Wiedemann syndrome (BWS) was ultrasonographically appraised at intervals during her pregnancy. Unequivocal evidence for a diagnosis of BWS was obtained in the fetus and this was confirmed postnatally. Early ultrasound diagnosis enabled appropriate genetic counselling to be given; neon...
journal_title:Prenatal diagnosis
pub_type: 杂志文章,评审
doi:10.1002/pd.1970110306
更新日期:1991-03-01 00:00:00
abstract:OBJECTIVES:To present the prenatal diagnosis of a fetus of mos46,X,del(Y)(q11.2)/45,X by cytogenetic and molecular analysis. CASE AND METHODS:A 35-year-old pregnant woman came to our hospital for amniocentesis, and fetal chromosomal aberrations with mos46,X, + mar/45,X were found. Fluorescence in situ hybridization re...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/pd.817
更新日期:2004-02-01 00:00:00
abstract:OBJECTIVES:To present the prenatal diagnosis of mosaic distal 5p deletion and a review of the literature. CLINICAL SUBJECT AND METHODS:A 37-year-old woman, gravida 2, para 1, underwent genetic amniocentesis at 17 weeks' gestation because of advanced maternal age. Cytogenetic analysis of the cultured amniocytes reveale...
journal_title:Prenatal diagnosis
pub_type: 杂志文章,评审
doi:10.1002/pd.794
更新日期:2004-01-01 00:00:00
abstract::Thirty perinatal solid tissue samples were used in a pilot study to test the efficacy of collagenase disaggregation onto coverslips, open system culture under low O2 conditions, pre-harvest incubation in bromodeoxyuridine (BrdU) and colcemid, and in situ automated harvesting. Following the success of the pilot study, ...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/(SICI)1097-0223(199607)16:7<615::AID-PD920
更新日期:1996-07-01 00:00:00
abstract::A 45-year-old woman underwent serial ultrasound screening procedures during late first and second trimesters of pregnancy for advanced maternal age. Cultured amniocytes karyotype indicated full trisomy 21. Subsequently, the fetus developed congenital cataract diagnosed at 24 weeks. This is the first antenatal diagnosi...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/(sici)1097-0223(199908)19:8<780::aid-pd634
更新日期:1999-08-01 00:00:00
abstract:OBJECTIVE:The objective of the study is to assess the clinical application of noninvasive prenatal testing (NIPT) for VTS pregnancies after the treatment of assisted reproductive technology (ART). METHOD:This was a retrospective study on VTS pregnancies through ART treatment. Participants underwent NIPT at 11 to 13 we...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/pd.5836
更新日期:2020-10-02 00:00:00
abstract::22q11.2 deletion, the most common microdeletion syndrome within the general population, is estimated to have a prevalence of 1 in 3000 to 6000. Non-invasive prenatal testing has recently expanded to include screening for several microdeletions including 22q11.2. Given the expansion of prenatal screening options to inc...
journal_title:Prenatal diagnosis
pub_type: 信件
doi:10.1002/pd.5022
更新日期:2017-04-01 00:00:00
abstract::Consanguineous partners had a boy with campomelic dysplasia who died of increasing respiratory distress soon after birth. The next pregnancy was monitored frequently by ultrasonography and a healthy male infant was born at term. During a further pregnancy, ultrasonography suggested campomelic dysplasia in the 16th wee...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/pd.1970050102
更新日期:1985-01-01 00:00:00
abstract::Intra-hepatic abnormalities of the fetal umbilical venous system are poorly documented and clinically not well understood. A case of routine ultrasound examination at 23 weeks' gestation demonstrating foci of hepatic hyperechogenicity and cardiomegaly is presented. Colour Doppler detected absence of flow in the ductus...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:
更新日期:1997-10-01 00:00:00
abstract::This report describes a case of a paternal balanced, but apparently non-reciprocal, insertion of chromosome 15 material into the short arm of chromosome 17 with difficulties in distinguishing between the normal and the deleted chromosome 15 in prenatal karyotype analysis. Microdissection and degenerate oligonucleotide...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:
更新日期:1997-04-01 00:00:00
abstract:OBJECTIVE:To test the hypothesis that the age-related increase in the birth prevalence of Down syndrome is less for women with higher levels of education due to their more frequent use of prenatal diagnosis. METHODS:We compared the effects of maternal age on the odds of Down syndrome at birth, and on amniocentesis use...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/pd.749
更新日期:2004-02-01 00:00:00
abstract::Between February 1994 and February 1997 a group of 881 women completed a questionnaire on the use of folic acid. During the study period the percentage of women who had been informed about the benefits of folic acid rose from 41 per cent to 90 per cent and the percentage taking supplementation rose from 18 per cent to...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:
更新日期:1999-02-01 00:00:00
abstract::Distal 10q trisomy is a well-defined but rare syndrome. Most cases are diagnosed in infancy or in childhood and rarely include prenatal findings. We present a case of fetal distal 10q trisomy with abnormal prenatal sonographic findings. A 19-year-old primigravida was referred for genetic counselling at 18 gestational ...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/(sici)1097-0223(199909)19:9<876::aid-pd651
更新日期:1999-09-01 00:00:00
abstract::Childhood-onset spinal muscular atrophy (SMA) is one of the most common neurodegenerative genetic disorders. SMN1 is the SMA-determining gene deleted or mutated in the majority of SMA cases. There is no effective cure or treatment for this disease yet. Thus, the availability of prenatal testing is important. Here we r...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/pd.384
更新日期:2002-08-01 00:00:00
abstract::A case of early diagnosis at 13 weeks' gestational age of Meckel-Gruber syndrome by ultrasound is reported in a patient with a 25 per cent recurrence risk. The usefulness of genetic counselling and aimed echographic examination is discussed. ...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/pd.1970090307
更新日期:1989-03-01 00:00:00
abstract::Cytogenetic microarray analysis (CMA) in prenatal testing detects chromosome abnormalities and new genetic syndromes that would be missed by conventional cytogenetics and has the potential to significantly enhance prenatal genetic evaluation. A large Eunice Kennedy Shriver National Institute Of Child Health and Human ...
journal_title:Prenatal diagnosis
pub_type: 临床试验,杂志文章
doi:10.1002/pd.3863
更新日期:2012-04-01 00:00:00
abstract::We studied a family at risk for atypical TSD in which the index case showed, clinically, a late onset and a gradual psychomotor deterioration and biochemically, a residual hex. A activity in leucocytes. Two prenatal diagnoses of affected fetuses were made in this family. The first one on amniotic cells, the second one...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/pd.1970040507
更新日期:1984-09-01 00:00:00
abstract::This study was undertaken in an attempt to determine the significance of elevated maternal serum human chorionic gonadotropin (MShCG), in the presence of an otherwise normal screen with respect to fetal malformations, chromosomal aberrations, and pregnancy outcome. Targeted ultrasound findings and perinatal outcome of...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:
更新日期:1997-11-01 00:00:00
abstract::We report on the prenatal diagnosis of ring chromosome 15 in a fetus with increased nuchal fold and intrauterine growth restriction (IUGR). A 27-year-old woman gravida 2, para 1 had normal maternal serum screen tests in the early second trimester of the index pregnancy. Fetal nuchal fold thickening up to 8 mm was inci...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/pd.168
更新日期:2001-12-01 00:00:00
abstract:OBJECTIVE:Enrichment of circulating trophoblasts (CTs) from maternal blood at week 11-13 of gestation, using laminar microscale vortices, and evaluation of the performance of the VTX-1 Liquid Biopsy System in terms of CT recovery and purity. METHOD:Eight mililiter of blood was collected from 15 pregnant women and proc...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/pd.5901
更新日期:2021-01-12 00:00:00
abstract::Comparative genomic hybridization (CGH) is a FISH-related technique used to assess global chromosomal aberrations in a variety of human tumours. Recently CGH has been applied to cytogenetic analysis of fresh frozen fetoplacental tissues. Here we report the application of CGH to paraffin-embedded placental samples. Ten...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:
更新日期:2000-01-01 00:00:00
abstract::The aim of this study was to evaluate the detection of fetal structural abnormalities by the 11-14 week scan. 2853 pregnant women were submitted to a routine ultrasound scan between the 11th and 14th week and the fetal skull, brain, spine, abdominal wall, limbs, stomach and bladder were examined. Following the scans t...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/pd.200
更新日期:2002-01-01 00:00:00
abstract:OBJECTIVES:To review the accuracy of self-reporting of smoking status in our first trimester screening population and to assess the levels of pregnancy-associated plasma protein-A (PAPP-A) and free-β human chorionic gonadotropin (free-hCGβ) in women who were classified for smoking status by serum cotinine concentration...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/pd.4053
更新日期:2013-03-01 00:00:00
abstract::A case of combined partial mole and neural tube defect is presented. The detection of high levels of both maternal serum (MS) alpha-fetoprotein (AFP) and human chorionic gonadotrophin (hCG) during the second trimester led to the ultrasonic demonstration of anencephaly, omphalocele, and partial mole. This is the first ...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/pd.1970120411
更新日期:1992-04-01 00:00:00