• Cesarean Delivery
    • Ronald J Wapner
    • Ronald J Wapner: Influence Statistics

      Ronald J Wapner

      Ronald J Wapner

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      Department of Obstetrics & Gynecology, Columbia University Medical Center, New York, NY, USA. | Department of Obstetrics and Gynecology, Columbia University, New York, NY. | ...

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      Ronald J Wapner:Expert Impact

      Concepts for whichRonald J Wapnerhas direct influence:Cesarean delivery,Preterm birth,Preterm delivery,Gestational age,Prenatal diagnosis,Uterine rupture,Pregnant women,Antenatal corticosteroids.

      Ronald J Wapner:KOL impact

      Concepts related to the work of other authors for whichfor which Ronald J Wapner has influence:Preterm birth,Gestational diabetes,Pregnant women,Cesarean delivery,Prenatal diagnosis,Placenta accreta,Cervical length.

      KOL Resume for Ronald J Wapner


      Department of Obstetrics & Gynecology, Columbia University Medical Center, New York, NY, USA.

      Columbia University, 622 West 168(th) Street, New York, NY 10032, United States. Electronic address:


      Institute for Genomic Medicine, Columbia University Irving Medical Center, New York, New York, USA.

      Columbia University, New York, NY, USA


      Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Columbia University, New York City, NY.

      Columbia University, New York, NY


      Department of Obstetrics and Gynecology,Columbia University,New York, NY 10032e-mail:

      Obstetrics and Gynecology, Columbia Univ Med Cntr, New York, NY

      Drexel University, Philadelphia, PA, United States of America

      College of Physicians and Surgeons, Columbia University, New York, New York (K.K., D.B.G., A.G.G., R.W., W.K.C.).


      Departments of Obstetrics and Gynecology, Northwestern University, Chicago, Illinois, University of Texas Medical Branch, Galveston, Texas, MetroHealth Medical Center–Case Western Reserve University, Cleveland, Ohio, Columbia University, New York, New York, University of Utah Health Sciences Center, Salt Lake City, Utah, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, University of Pittsburgh, Pittsburgh, Pennsylvania, The Ohio State University, Columbus, Ohio, University of Alabama at Birmingham, Birmingham, Alabama, Wayne State University, Detroit, Michigan, Brown University, Providence, Rhode Island, University of Texas Health Science Center at Houston–Children’s Memorial Hermann Hospital, Houston, Texas, and Oregon Health & Science University, Portland, Oregon; the George Washington University Biostatistics Center, Washington, DC; and the Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, Maryland.

      Department of Obstetrics & Gynecology, Columbia University College of Physicians and Surgeons, Columbia University Medical Center, New York, NY.

      Columbia University New York NY USA

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      Sample of concepts for which Ronald J Wapner is among the top experts in the world.
      Concept World rank
      shape ogtt curve #1
      gestation randomized trial #1
      countries nipt #1
      auc trisomy #1
      visit relationship #1
      amniocentesis twin gestations #1
      pregnancyassociated hypertension women #1
      acs courses #1
      high‐risk population #1
      higherorder multiple gestations #1
      median early onset #1
      hdp mid period #1
      nulliparous gravidas #1
      15 hours oxytocin #1
      goal gestational #1
      psychosocial measures women #1
      d6 d15 #1
      cervical funneling aor #1
      tdid cohort 24d #1
      standard screening p0001 #1
      il1β ndd #1
      neonates black #1
      reported alcohol tobacco #1
      magnesium sulfate obstetricians #1
      1 antagonists excitability #1
      natural euploid pregnancies #1
      cffdna women #1
      pregnancy outcome fetuses #1
      ogtt values sum #1
      fetal sequencing consortium #1
      trajectory preeclampsia #1
      interaction treatment initiation #1
      39 visit #1
      numom2bhhs #1
      fgr increased rates #1
      preeclampsia predictor #1
      bmi smo #1
      funneling 2d #1
      risks cvs #1
      boys urinary biomarkers #1
      weight visits #1
      gwas preeclampsia #1
      prs gdm #1
      cffdna 24 #1
      fgr rates #1
      cpm false positive #1
      standard karyotyping #1
      cases maternal complications #1
      external internal samples #1
      neonatal measurements #1
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      Prominent publications by Ronald J Wapner

      KOL-Index: 20126

      BACKGROUND: The proportion of women who attempt vaginal delivery after prior cesarean delivery has decreased largely because of concern about safety. The absolute and relative risks associated with a trial of labor in women with a history of cesarean delivery, as compared with elective repeated cesarean delivery without labor, are uncertain.

      METHODS: We conducted a prospective four-year observational study of all women with a singleton gestation and a prior cesarean delivery at 19 ...

      Known for Labor Women | Cesarean Delivery | Perinatal Outcomes | Elective Repeated | Hypoxicischemic Encephalopathy
      KOL-Index: 18391

      BACKGROUND: Recently updated American College of Cardiology/ American Heart Association (ACC/AHA) guidelines redefine blood pressure categories as stage 1 hypertension (systolic, 130-139 mm Hg or diastolic, 80-89 mm Hg), elevated (systolic, 120-129 mm Hg and diastolic, <80 mm Hg), and normal (<120/<80 mm Hg), but their relevance to an obstetric population is uncertain.

      OBJECTIVE: We sought to evaluate the risk of gestational hypertension or preeclampsia based on early pregnancy blood ...

      Known for Hypertensive Disorders | Blood Pressure | Gestational Hypertension | Risk Preeclampsia | Mm Hg
      KOL-Index: 18380

      OBJECTIVES: We sought to determine the predictive accuracy for preterm delivery of transvaginal ultrasonography of the cervix between 14 and 24 weeks' gestation in high-risk patients and to determine whether cerclage prevents preterm delivery in patients with ultrasonographic cervical changes.

      STUDY DESIGN: Patients with asymptomatic singleton pregnancies at high risk for preterm delivery were followed prospectively from 14 weeks' to 23 weeks 6 days' gestation with transvaginal ...

      Known for Preterm Delivery | Transvaginal Ultrasonography | Patients Risk | Gestational Age | Sensitivity Specificity
      KOL-Index: 18071

      OBJECTIVE: Assess effects of body mass index (BMI) on trial of labor after previous cesarean delivery and determine whether morbidly obese women have greater maternal and perinatal morbidity with trial of labor compared with elective repeat cesarean delivery.

      METHODS: Secondary analysis from a prospective observational study included all term singletons undergoing trial of labor after previous cesarean delivery. Body mass index groups were as follows: normal 18.5-24.9, overweight ...

      Known for Previous Cesarean Delivery | Trial Labor | Repeat Cesarean | Morbid Obesity | Obese Women
      KOL-Index: 17931

      OBJECTIVE: To determine whether the risk for uterine rupture is increased in women attempting vaginal birth after multiple cesarean deliveries.

      METHODS: We conducted a prospective multicenter observational study of women with prior cesarean delivery undergoing trial of labor and elective repeat operation. Maternal and perinatal outcomes were compared among women attempting vaginal birth after multiple cesarean deliveries and those with a single prior cesarean delivery. We also compared ...

      Known for Uterine Rupture | Prior Cesarean | Labor Women | Vaginal Birth | Maternal Morbidity
      KOL-Index: 17790

      Elevated concentrations of interleukin-6 (IL-6), C-reactive protein (CRP), and matrix metalloproteinase-9 (MMP-9) in fetal and neonatal compartments have been associated with an increased risk for preterm birth (PTB) and/or neonatal morbidity. The purpose of this study was to determine if the maternal serum concentration of IL-6, CRP, and MMP-9 in women at risk for PTB, who are not in labor and have intact membranes, are associated with an increased risk for PTB <32 weeks and/or neonatal ...

      Known for Maternal Serum | Adverse Neonatal Outcomes | Preterm Birth | Il6 Crp | Reactive Protein
      KOL-Index: 17121

      BACKGROUND: Because of increased rates of respiratory complications, elective cesarean delivery is discouraged before 39 weeks of gestation unless there is evidence of fetal lung maturity. We assessed associations between elective cesarean delivery at term (37 weeks of gestation or longer) but before 39 weeks of gestation and neonatal outcomes.

      METHODS: We studied a cohort of consecutive patients undergoing repeat cesarean sections performed at 19 centers of the Eunice Kennedy Shriver ...

      Known for Repeat Cesarean | Neonatal Outcomes | 39 Weeks Gestation | 37 Weeks | Newborn Sepsis
      KOL-Index: 16915

      BACKGROUND: Infection with Trichomonas vaginalis during pregnancy has been associated with preterm delivery. It is uncertain whether treatment of asymptomatic trichomoniasis in pregnant women reduces the occurrence of preterm delivery.

      METHODS: We screened pregnant women for trichomoniasis by culture of vaginal secretions. We randomly assigned 617 women with asymptomatic trichomoniasis who were 16 to 23 weeks pregnant to receive two 2-g doses of metronidazole (320 women) or placebo (297 ...

      Known for Pregnant Women | Preterm Delivery | Asymptomatic Trichomonas | Vaginalis Infection | Newborn Infant
      KOL-Index: 16882

      Importance: Spontaneous preterm birth is a leading cause of infant mortality. Prediction, largely based on prior pregnancy outcomes, is not possible in women pregnant for the first time.

      Objective: To assess the accuracy of universal screening to predict spontaneous preterm birth in nulliparous women using serial measurements of vaginal fetal fibronectin levels and cervical length.

      Design, Settings, and Participants: A prospective observational cohort study of nulliparous women with ...

      Known for Cervical Length | Spontaneous Preterm Birth | Nulliparous Women | Fetal Fibronectin | Predictive Accuracy
      KOL-Index: 15717

      BACKGROUND: Accurately identifying pregnancies with accelerated or diminished fetal growth is challenging and generally based on cross-sectional percentile estimates of fetal weight. Longitudinal growth velocity might improve identification of abnormally grown fetuses.

      OBJECTIVE: We sought to complement fetal size standards with fetal growth velocity, develop a model to compute fetal growth velocity percentiles for any given set of gestational week intervals, and determine association ...

      Known for Growth Velocity | Fetal Weight | Abdominal Circumference | Biparietal Diameter | Pregnancy Trimester
      KOL-Index: 15469

      BACKGROUND: Identification of chromosomal aneuploidies and copy number variants that are associated with fetal structural anomalies has substantial value. Although whole-exome sequencing (WES) has been applied to case series of a few selected prenatal cases, its value in routine clinical settings has not been prospectively assessed in a large unselected cohort of fetuses with structural anomalies. We therefore aimed to determine the incremental diagnostic yield (ie, the added value) of ...

      Known for Structural Anomalies | Prospective Cohort | Wes Fetuses | Genetic Variants | Exome Sequencing
      KOL-Index: 15397

      BACKGROUND: Systematic evaluation and estimation of growth trajectories in twins require ultrasound measurements across gestation that are performed in controlled clinical settings. Currently, there are few such data for contemporary populations. There is also controversy about whether twin fetal growth should be evaluated with the use of the same benchmarks as singleton growth.

      OBJECTIVES: Our objective was to define the trajectory of fetal growth in dichorionic twins empirically using ...

      Known for Fetal Growth | Twins Singletons | Dichorionic Twin | Gestational Age | Gestation Differences
      KOL-Index: 15045

      BACKGROUND: Bacterial vaginosis has been associated with preterm birth. In clinical trials, the treatment of bacterial vaginosis in pregnant women who previously had a preterm delivery reduced the risk of recurrence.

      METHODS: To determine whether treating women in a general obstetrical population who have asymptomatic bacterial vaginosis (as diagnosed on the basis of vaginal Gram's staining and pH) prevents preterm delivery, we randomly assigned 1953 women who were 16 to less than 24 ...

      Known for Preterm Delivery | Bacterial Vaginosis | Pregnant Women | Treatment Metronidazole | Obstetric Labor
      KOL-Index: 14560

      OBJECTIVE: Current information on the risk of uterine rupture after cesarean delivery has generally compared the risk after trial of labor to that occurring with an elective cesarean delivery without labor. Because antepartum counseling cannot account for whether a woman will develop an indication requiring a repeat cesarean delivery or whether labor will occur before scheduled cesarean delivery, the purpose of this analysis was to provide clinically useful information regarding the ...

      Known for Uterine Rupture | Cesarean Delivery | Perinatal Outcome | Labor Women | Elective Repeat
      KOL-Index: 14413

      OBJECTIVE: To compare morbidity among small-for-gestational-age (SGA; birth weight less than the 10th percentile for gestational age), appropriate-for-gestational-age (AGA; birth weight 10th to 90th percentile; reference group), and large-for-gestational-age (LGA; birth weight greater than the 90th percentile) neonates in apparently uncomplicated pregnancies at term (37 weeks of gestation or greater).

      METHODS: This secondary analysis, derived from an observational obstetric cohort of ...

      Known for Neonatal Morbidity | Uncomplicated Pregnancies | Newborn Infant | Aga Lga | Birth Weight

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      Department of Obstetrics & Gynecology, Columbia University Medical Center, New York, NY, USA. | Department of Obstetrics and Gynecology, Columbia University, New York, NY. | Department of Obstetrics and Gynecology, Division of Maternal-Fetal Medicine

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