Publications by authors named "Chern S"

We implement and characterize a protocol that enables arbitrary local controls in a dipolar atom array, where the degree of freedom is encoded in a pair of Rydberg states. Our approach relies on a combination of local addressing beams and global microwave fields. Using this method, we directly prepare two different types of three-atom entangled states, including a W state and a state exhibiting finite chirality.

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Purpose: This study explored the use of an automated language analysis tool, FLUCALC, for measuring fluency in aphasia. The purpose was to determine whether CLAN's FLUCALC command could produce efficient, objective outcome measures for salient aspects of fluency in aphasia.

Method: The FLUCALC command was used on CHAT transcripts of Cinderella stories from people with aphasia (PWA; = 281) and controls ( = 257) in the AphasiaBank database.

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Objective: We present prenatal diagnosis of mosaic trisomy 18 and maternal uniparental disomy (UPD) 18 in a pregnancy with a favorable fetal outcome.

Case Report: A 34-year-old woman underwent amniocentesis at 17 weeks of gestation because of advanced maternal age, and the result was 47,XY,+18 [4]/46,XY [25] in cultured amniocytes. Simultaneous array comparative genomic hybridization (aCGH) on uncultured amniocytes revealed 65% mosaicism for trisomy 18.

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Objective: We present genetic counseling, prenatal diagnosis and postnatal follow-up of 45,XY,der(15;22)(q10;q10)mat/46,XY,i(15)(q10)/46,XY at amniocentesis in a pregnancy with a favorable fetal outcome.

Case Report: A 27-year-old, primigravid woman underwent amniocentesis at 19 weeks of gestation because increased nuchal translucency thickness, and the result was 45,XY,der(15;22)(q10;q10)[29]/46,XY,i(15)(q10)[3]/46,XY[5]. Simultaneous array comparative genomic hybridization (aCGH) analysis on the DNA extracted from uncultured amniocytes revealed arr (1-22) × 2, (X,Y) × 1.

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Objective: We present low-level mosaic trisomy 21 at amniocentesis associated with a favorable fetal outcome.

Case Report: A 31-year-old primigravid woman underwent non-invasive prenatal testing (NIPT) at 12 weeks of gestation, and the result was normal. She underwent amniocentesis at 16 weeks of gestation because of fetal choroid plexus cyst, and the result was 47,XX,+21[5]/46,XX[32].

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Objective: We present low-level mosaic trisomy 13 at amniocentesis in a pregnancy associated with a positive non-invasive prenatal testing (NIPT) result suspicious of trisomy 13, a chorionic villus sampling (CVS) result of mosaic trisomy 13, cytogenetic discrepancy in various tissues and a favorable fetal outcome.

Case Report: A 29-year-old, gravida 2, para 1, woman underwent amniocentesis at 20 weeks of gestation because of a positive NIPT result (Z-score = 20.9, positive ≥3) suspicious of trisomy 13 at 11 weeks of gestation and a CVS result of mosaic trisomy 13 at 14 weeks of gestation.

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Objective: We present low-level mosaic trisomy 2 at amniocentesis in a pregnancy associated with positive non-invasive prenatal testing (NIPT) and chorionic villus sampling (CVS) results for trisomy 2, maternal uniparental disomy (UPD) 2, perinatal progressive decrease of the aneuploid cell line, cytogenetic discrepancy between cultured amniocytes and uncultured amniocytes, intrauterine growth restriction (IUGR) and a favorable fetal outcome.

Case Report: A 35-year-old, primigravid woman underwent amniocentesis at 16 weeks of gestation because both NIPT at 9 weeks of gestation and CVS at 11 weeks of gestation revealed trisomy 2. This pregnancy was conceived by in vitro fertilization (IVF) and embryo transfer (ET).

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Objective: We present low-level mosaic double trisomy involving trisomy 6 and trisomy 20 (48,XY,+6,+20) at amniocentesis without uniparental disomy (UPD) 6 and UPD 20 in a pregnancy associated with a favorable outcome.

Case Report: A 38-year-old woman underwent amniocentesis at 17 weeks of gestation because of advanced maternal age. Amniocentesis revealed a karyotype of 48,XY,+6,+20[2]/46,XY[15].

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Objective: We present low-level mosaic trisomy 20 without uniparental disomy (UPD) 20 at amniocentesis in a pregnancy associated with a favorable outcome, cytogenetic discrepancy between uncultured amniocytes and cultured amniocytes and perinatal progressive decrease of the aneuploid cell line.

Case Report: A 36-year-old, gravida 2, para 1, woman underwent amniocentesis at 16 weeks of gestation because of advanced maternal age. Amniocentesis revealed a karyotype of 47,XY,+20[3]/46,XY[17].

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Article Synopsis
  • A case study highlights a pregnancy involving low-level mosaic trisomy 9 detected through amniocentesis, where the mother was a 37-year-old woman undergoing IVF-ET.
  • Initial and repeat amniocentesis revealed varying levels of trisomy 9 mosaicism, with findings showing a progressive decrease in aneuploid cells throughout the pregnancy.
  • Despite complications such as intrauterine growth restriction (IUGR), the pregnancy resulted in the delivery of a normal male baby with predominantly normal karyotypes in the umbilical cord, cord blood, and placenta.
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Article Synopsis
  • The case report discusses a 41-year-old woman who had a pregnancy confirmed to have low-level mosaic trisomy 9 through amniocentesis after a positive non-invasive prenatal test (NIPT) triggered caution.
  • Results showed maternal uniparental disomy (UPD) of chromosome 9 and intrauterine growth restriction (IUGR) but revealed no serious complications during pregnancy, leading to a favorable outcome.
  • A healthy baby was born at 37 weeks with normal development at three months, although the placenta had a full trisomy 9 karyotype while the baby displayed low-level mosaicism.
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Objective: We present prenatal diagnosis and molecular genetic analysis of recurrent trisomy 18 of maternal origin in two consecutive pregnancies.

Case Report: A 37-year-old, gravida 3, para 1, woman was referred for genetic counseling because of cystic hygroma on ultrasound at 12 weeks of gestation, a previous pregnancy with a fetus with trisomy 18, and an abnormal first-trimester non-invasive prenatal testing (NIPT) result of Z score of 9.74 (normal: -3.

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Objective: We present low-level mosaic trisomy 15 without uniparental disomy (UPD) 15 in a pregnancy associated with cytogenetic discrepancy between uncultured amniocytes and cultured amniocytes, a favorable fetal outcome and perinatal decrease of the aneuploid cell line.

Case Report: A 40-year-old, gravida 2, para 0, woman underwent amniocentesis at 16 weeks of gestation because advanced maternal age. This pregnancy was conceived by in vitro fertilization and embryo transfer.

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Article Synopsis
  • A 38-year-old woman underwent amniocentesis at 19 weeks of gestation due to her advanced maternal age, revealing low-level mosaic trisomy 13 in one of her twins (co-twin A) while the other twin (co-twin B) was normal.
  • Despite the presence of trisomy 13 in some cells, further genetic analysis showed no significant genomic imbalances, and both twins were delivered healthy at 37 weeks without any abnormalities.
  • Follow-up at 1½ years showed co-twin A was normal in both physical and psychomotor development, demonstrating that low-level mosaic trisomy 13 can lead to a favorable outcome.
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Objective: We present low-level mosaic trisomy 17 at amniocentesis in a pregnancy associated with a favorable fetal outcome and cytogenetic discrepancy between cultured and uncultured amniocytes.

Case Report: A 32-year-old, primigravid woman underwent amniocentesis at 18 weeks of gestation because of an increased nuchal translucency thickness of 3 mm in the first trimester sonographic screening. Amniocentesis revealed a karyotype of 47,XX,+17 [2]/46,XX [20].

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Objective: We present mosaic 46,XY,dup (14) (q12q22.3)/46, XY at amniocentesis in a pregnancy associated with a favorable fetal outcome and cytogenetic discrepancy in various tissues.

Case Report: A 41-year-old, primigravid woman underwent amniocentesis at 17 weeks of gestation because of advanced maternal age.

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Objective: We present an infertile male who was incidentally detected to have Klinefelter syndrome, a balanced reciprocal translocation of t(4; 17) (q12; q11.2) and an AZFa sY86 deletion. We review the literature and discuss the significance of 47,XXY, t(4; 17) (q12; q11.

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Objective: We present mosaic tetrasomy 9p at amniocentesis in a pregnancy associated with a favorable fetal outcome, perinatal progressive decrease of the aneuploid cell line and cytogenetic discrepancy in various tissue.

Case Report: A 33-year-old primigravid woman underwent elective amniocentesis at 18 weeks of gestation because of anxiety, and the karyotype of cultured amniocytes was 47,XX,+i (9) (p10)[20]/46,XX [55]. Cordocentesis was performed at 20 weeks of gestation, and the karyotype of cord blood was 47,XX,+i (9) (p10)[7]/46,XX [15].

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Article Synopsis
  • A 34-year-old woman had an amniocentesis at 17 weeks and was found to have a complex chromosomal abnormality with a karyotype showing mosaicism for an unbalanced translocation involving chromosomes 6 and 15.
  • Subsequent amniocentesis tests showed fluctuating levels of mosaicism, but the parents' karyotypes and ultrasound results remained normal throughout the pregnancy.
  • Ultimately, the baby was born healthy at 39 weeks with no phenotypic abnormalities, and follow-up tests at one month confirmed a normal karyotype.
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Objective: We present mosaic trisomy 21 at amniocentesis in a twin pregnancy associated with a favorable fetal outcome, maternal uniparental disomy (UPD) 21 and postnatal decrease of the trisomy 21 cell line.

Case Report: A 36-year-old woman underwent elective amniocentesis at 16 weeks of gestation because of advanced maternal age, and an abnormal non-invasive prenatal testing (NIPT) result suggesting trisomy 21. Amniocentesis revealed the karyotype of 46, XX in co-twin A and the karyotype of 47,XY,+21[12]/46,XY[21] in co-twin B in the cultured amniocytes by in situ culture method.

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Objective: We present mosaic trisomy 21 at amniocentesis associated with a favorable fetal outcome and perinatal progressive decrease of the trisomy 21 cell line.

Case Report: A 33-year-old woman underwent elective amniocentesis at 17 weeks of gestation because of anxiety, and the karyotype of cultured amniocytes was 47,XX,+21[4]/46,XX[13]. In 17 colonies of cultured amniocytes, four colonies had 47,XX,+21, while the other 13 colonies had 46,XX.

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Background: Closing the gap between child mortality in low- and middle-income countries (LMICs) and high-income countries is a priority set by the WHO in sustainable development goals (SDGs). We aimed to examine poor nutrition and prenatal and postnatal care that could increase the risk of child mortality in LMICs.

Methods: The Demographic and Health Survey (DHS) was used to examine data from 26 countries to compare prenatal, postnatal, nutritional, and demographic factors across LMICs.

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