Abstract:
:In the first trimester of pregnancy the biochemical markers free beta-hCG and pregnancy associated plasma protein-A (PAPP-A) are used for the prenatal screening of trisomy 21, either alone or in combination with nuchal translucency (NT) thickness. In this study, I have analysed the distribution of these biochemical markers in 159 twin pregnancies and compared this with 3466 singleton pregnancies. On average free beta-hCG values are 2.099 times greater in twins than in singletons and PAPP-A some 1.86 times greater. The width of the analyte distribution in twins is very similar to that in singleton pregnancies. Using statistical modelling techniques I have predicted that at a 5% false positive rate the detection rate in twins discordant for trisomy 21 will be 52% and in twins concordant for trisomy 21 will be 55%, if correction for twin pregnancy is carried out using the 'pseudo risk' approach. The detection rate using biochemical parameters is less than that achievable for twins using NT (75%). However, the combination of NT and maternal serum biochemistry will give detection rates approaching 80%. These rates are some 10% less than in singleton pregnancies, but nevertheless combining NT and biochemistry will allow high rates of detection of affected twins with the benefit of ultrasound and NT being able to specifically locate the affected twin. Twin screening using both modalities should be considered when introducing first trimester screening.
journal_name
Prenat Diagnjournal_title
Prenatal diagnosisauthors
Spencer Kdoi
10.1002/(sici)1097-0223(200002)20:2<91::aid-pd759>subject
Has Abstractpub_date
2000-02-01 00:00:00pages
91-5issue
2eissn
0197-3851issn
1097-0223pii
10.1002/(SICI)1097-0223(200002)20:2<91::AID-PD759>journal_volume
20pub_type
杂志文章abstract:OBJECTIVE:The objective of the study is to examine the incidence of chromosomal or genetic abnormalities in pregnancies complicated by polyhydramnios and to assess the value of prenatal ultrasound findings in the prediction of cases associated with such disorders. METHODS:We searched the prenatal records of all patien...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/pd.4851
更新日期:2016-08-01 00:00:00
abstract:OBJECTIVE:To test the hypothesis that free fetal DNA (ffDNA) circulating in maternal plasma originates mainly from the placenta we studied ffDNA levels in anembryonic pregnancies. METHODS:Maternal blood samples were collected from 15 normal first-trimester pregnancies in which fetal sex was subsequently determined and...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/pd.1700
更新日期:2007-05-01 00:00:00
abstract::Both human epidemiologic and animal model studies demonstrate that prenatal and lactational exposure to maternal obesity and high-fat diet are associated with adverse neurodevelopmental outcomes in offspring. Neurodevelopmental outcomes described in offspring of obese women include cognitive impairment, autism spectru...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/pd.5724
更新日期:2020-08-01 00:00:00
abstract::We investigated a case (I.I.) of the severe form of mucopolysaccharidosis I (Hurler syndrome). Prenatal diagnosis was requested by the parents and the next pregnancy was monitored. We report here a special difficulty arising in this diagnosis due to the low enzyme activity in the mother's cells (10-15 per cent of cont...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/pd.1970050209
更新日期:1985-03-01 00:00:00
abstract:OBJECTIVE:To determine the underlying molecular aetiology in a non-consanguineous Irish family who have had three fetal losses because of a primary myopathy characterised by fetal akinesia, arthrogryposis multiplex, bilateral pulmonary hypoplasia and reduced muscle bulk. METHODS:Fetal DNA extracted from amniotic cells...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/pd.4925
更新日期:2016-11-01 00:00:00
abstract:OBJECTIVE:Accounting for possible recombinations in developing an accurate preimplantation genetic diagnosis (PGD) protocol based on familial haplotypes. METHODS:Haplotypes were constructed from genomic DNA in a family where the male was affected with tuberous sclerosis complex (TSC). Embryos were biopsied at day 3, a...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/pd.2070
更新日期:2008-10-01 00:00:00
abstract:OBJECTIVE:The aim of this study was to assess the performance of cardio-biparietal ratio measured by real-time two-dimensional ultrasound in predicting hemoglobin (Hb) Bart disease among fetuses at risk. METHOD:This prospective diagnostic study recruited pregnancies at risk for Hb Bart disease at 17 to 22 weeks' gesta...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/pd.5478
更新日期:2019-07-01 00:00:00
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::From both presentations, it is clear that understanding the APO associated with placental dysfunction represents one of the greatest challenges in the field of prenatal screening, diagnosis, and therapy. Their clinical impact on the health of the mother and child was well recognized by the debaters, and both have agre...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/pd.4533
更新日期:2015-01-01 00:00:00
abstract:OBJECTIVE:Fetal myelomeningocele (fMMC) surgery improves infant outcomes when compared with postnatal surgery. Surgical selection criteria and the option of pregnancy termination, however, limit the number of cases that are eligible for prenatal surgery. We aimed to quantify what proportion of cases could ultimately be...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/pd.5390
更新日期:2019-01-01 00:00:00
abstract:OBJECTIVE:MicroRNAs (miRNAs) are used as biomarkers in cardiovascular disease and cancer. miRNAs are involved in placental development but have not previously been investigated in twin-twin transfusion syndrome (TTTS). Our aim is to explore the miRNA profile of TTTS pregnancies. METHOD:Initial miRNA profiling was perf...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/pd.5475
更新日期:2019-07-01 00:00:00
abstract::This study evaluates the long-term pulmonary complications of 25 children from a prospective, matched-control, pilot study evaluating short-term complications of early (11-14 weeks' gestation) versus traditional (15 weeks' gestation and later) genetic amniocentesis. Five children in the early amniocentesis group were ...
journal_title:Prenatal diagnosis
pub_type: 临床试验,杂志文章
doi:10.1002/pd.1970140312
更新日期:1994-03-01 00:00:00
abstract:OBJECTIVE:The aim of this study was to compare the levels of maternal serum placental growth factor (PlGF) and soluble fms-like tyrosine kinase-1 (sFlt-1) between pregnancies with fetal hemoglobin (Hb) Bart's disease and unaffected pregnancies. METHODS:Ninety-one pregnancies at risk for fetal Hb Bart's disease schedul...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/pd.4246
更新日期:2013-12-01 00:00:00
abstract:OBJECTIVE:Complications in pregnancy are suggested to be the result of intrauterine conditions in the first trimester of pregnancy. Three-dimensional ultrasound volume measurements might give more information, compared with two-dimensional measurements. Commonly available methods for volume measurements are not suited ...
journal_title:Prenatal diagnosis
pub_type: 临床试验,杂志文章
doi:10.1002/pd.3900
更新日期:2012-08-01 00:00:00
abstract::During the period 1987 through mid-1993, 118 490 chromosome analyses from amniocytes were performed at the Integrated Genetics Laboratories in Santa Fe, New Mexico (formerly Vivigen Laboratories). This report summarizes the data for all specimens submitted because of anomalies seen during ultrasound examination; this ...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/(SICI)1097-0223(199602)16:2<109::AID-PD818
更新日期:1996-02-01 00:00:00
abstract:OBJECTIVES:To investigate if systemic hypertension occurs in fetuses with twin-to-twin transfusion syndrome (TTTS). METHODS:We conducted an observational cohort study in a tertiary care centre in 23 pregnant women with TTTS. Polyhydramnios stuck twin sequence occurred at a median gestational age of 22 weeks (range 15-...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/pd.652
更新日期:2003-08-01 00:00:00
abstract:BACKGROUND:Multiplex ligation-dependent probe amplification (MLPA) is a relatively new method for rapid prenatal diagnosis of common aneuploidies, and larger series to evaluate its performance remain to be reported. METHODS:A total of 2400 prenatal chorionic villus samples (CVS) and 1525 prenatal samples of amniotic f...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/pd.2137
更新日期:2008-12-01 00:00:00
abstract::A 17-year-old woman was referred for amniocentesis due to a low maternal serum alpha-fetoprotein (AFP) concentration in a voluntary screening test. The fetal karyotype was 48,XXYY, and the pregnancy was terminated. Autopsy of the fetus disclosed agenesis of the corpus callosum and unusual facial features. ...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/pd.1970140724
更新日期:1994-07-01 00:00:00
abstract:OBJECTIVES:The aim of this study was to establish the frequency and associations of single umbilical artery (SUA) diagnosed until the first vs second or third trimester. METHODS:A retrospective cohort study was conducted on singleton pregnancies at a tertiary perinatal center. All women underwent both the first and se...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/pd.5471
更新日期:2019-07-01 00:00:00
abstract:OBJECTIVE:Intact atrial septum or highly restrictive inter-atrial communication (I/HRAS) combined with either severe aortic stenosis (SAS) or hypoplastic left heart syndrome (HLHS), respectively, is associated with adverse outcome. This study focusses on changes in alveolo-septal lung parenchyma due to increased left a...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/pd.4559
更新日期:2015-05-01 00:00:00
abstract:OBJECTIVE:To identify the correlation between the renal vascularization index (VI), the flow index (FI) and the vascularization and flow index (VFI) and placental and fetal hemodynamics in fetuses with growth restriction. METHOD:Bidimensional ultrasound and three-dimensional power Doppler with the VOCAL technique were...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/pd.5099
更新日期:2017-08-01 00:00:00
abstract::The purpose of the present study was to determine the postnatal outcome and prognostic factors of prenatally diagnosed ventriculomegaly, and to establish the relationship between prenatal sonographic measurements and postnatal psychomotor development. A total of 42 singleton pregnancies with sonographically determined...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/(sici)1097-0223(199806)18:6<557::aid-pd303
更新日期:1998-06-01 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:OBJECTIVE:To construct new reference charts and equations for fetal biparietal diameter (BPD), head circumference (HC), abdominal circumference (AC) and femur diaphysis length (FDL) from Korean fetuses at 12-40 weeks. METHOD:Prospective cross-sectional data obtained in one center for 5 years from a population of pregn...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/pd.1729
更新日期:2007-06-01 00:00:00
abstract::The diagnosis of Dandy-Walker malformation was made on the ultrasonographic evaluation of a 33-week male fetus. Pedigree analysis revealed a family history of isolated Dandy-Walker malformation in three other males, suggesting an X-linked recessive inheritance pattern. ...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/pd.1970130203
更新日期:1993-02-01 00:00:00
abstract::Reversed end-diastolic umbilical artery velocities and a reduced chorionic sac were first seen at 10 weeks in a pregnancy subsequently showing a normal male karyotype on chorionic villi. Four weeks later Doppler studies demonstrated normal umbilical artery waveforms. At 20 weeks, ultrasound examination of the fetus re...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/(sici)1097-0223(1998100)18:10<1001::aid-pd
更新日期:1998-10-01 00:00:00
abstract::We report one case of de novo complex chromosomal rearrangement (CCR) t(2q;3p;4q;13q) with at least five chromosomal breakpoints. This CCR was detected prenatally at 22 weeks of gestation, when mild echographic indications were disclosed during a routine examination in a female with no family history of congenital abn...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/(SICI)1097-0223(199611)16:11<1046::AID-PD9
更新日期:1996-11-01 00:00:00
abstract::Fetal pleural effusion, a nonspecific accumulation of fluid in the pleural space, is an uncommon anomaly which can be associated with aneuploidy and a range of other structural malformations or genetic syndromes. Spontaneous resolution is not rare and confers a good prognosis. Perinatal outcome is better for those fet...
journal_title:Prenatal diagnosis
pub_type: 杂志文章,评审
doi:10.1002/pd.1768
更新日期:2007-09-01 00:00:00
abstract::Two severely growth-retarded fetuses found to have maternal uniparental disomy (UPD) for chromosome 16 and trisomy 16 placental mosaicism both had an unfavourable outcome. Antenatally, the first case was complicated by an unexplained raised maternal serum alpha-fetoprotein concentration, preterm premature rupture of t...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/pd.1970140817
更新日期:1994-08-01 00:00:00
abstract:OBJECTIVE:To assess the outcome of fetuses who had sonographic features suggestive of Pierre Robin Sequence (PRS). METHOD:All prenatal ultrasounds that mentioned 'posterior cleft palate', or 'micro or retrognathia' or 'PRS' over 13 and 20 years, respectively, at two obstetrical centers were reviewed. Medical records f...
journal_title:Prenatal diagnosis
pub_type: 杂志文章
doi:10.1002/pd.4619
更新日期:2015-09-01 00:00:00