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Ramen H. Chmait, MD

Title(s)Associate Professor of Obstetrics & Gynecology (Clinical Scholar)
Phone+1 323 226 3306
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    Other Positions
    Title(s)Director of Fetal Surgery Program


    Collapse Biography 
    Collapse Awards and Honors
    2011  - 2014U.S. News Top Doctors
    Fetal Hope2008Light of Hope Award
    UCSD Department of Reproductive Medicine2003Fellows Teaching Award
    Kaiser Permanente Los Angeles Medical Center 2000Resident Research Award

    Collapse Overview 
    Collapse Overview
    Ramen Chmait, MD is Assistant Professor of Clinical Obstetrics and Gynecology, Pediatrics, and Surgery at the University of Southern California’s Keck School of Medicine. Dr. Chmait has served as director of Los Angeles Fetal Therapy since 2006. The Los Angeles Fetal Therapy is a program within the CHLA-USC Institute for Maternal-Fetal Health. In this capacity he has provided surgical treatment to hundreds of unborn children. Dr. Chmait also directs a research program devoted to understanding fetal disease and investigating potential treatment modalities.

    Collapse Research 
    Collapse Research Activities and Funding
    Pre-Clinical Development of a Fetal Micropacemaker
    NIH/NICHD R01HD075135Sep 30, 2012 - Aug 31, 2015
    Role: Principal Investigator

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    Collapse Required Scholarly Project Mentor

    Collapse Bibliographic 
    Collapse Publications
    Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Researchers can login to make corrections and additions, or contact us for help.
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    1. Chmait RH, Kontopoulos EV, Quintero RA. Uterine Legacy of Open Maternal-Fetal Surgery: Preterm Uterine Rupture. Am J Obstet Gynecol. 2019 Jul 24. PMID: 31351066.
      View in: PubMed
    2. Quintero R, Kontopoulos E, Williams ME, Sloop J, Vanderbilt D, Chmait RH. Neurodevelopmental outcome of monochorionic twins with selective intrauterine growth restriction (SIUGR) type II: laser versus expectant management. J Matern Fetal Neonatal Med. 2019 Jul 16; 1-9. PMID: 31309857.
      View in: PubMed
    3. Post RJ, Friedrich E, Amaya KE, Chmait RH. Inadvertent Perforation of a Gravid Uterus During Laparoscopy. JSLS. 2019 Jul-Sep; 23(3). PMID: 31427852.
      View in: PubMed
    4. Grubbs BH, Ching MM, Parducho KR, Chmait RH, Miki T. Ultrasound-guided in Utero Transplantation of Placental Stem Cells into the Liver of Crigler-Najjar Syndrome Model Rat. Transplantation. 2019 Jul; 103(7):e182-e187. PMID: 30985583.
      View in: PubMed
    5. Chang MR, Chon AH, Baskin J, Nael A, Chmait RH. Case 1: Cardiac Arrest in a 2-month-old Boy with a Prenatal Course Complicated by Alloimmunization. Pediatr Rev. 2019 May; 40(5):243-246. PMID: 31043443.
      View in: PubMed
    6. Chon AH, Chan Y, Korst LM, Llanes A, Abdel-Sattar M, Chmait RH. Quantitative fetal fibronectin to predict spontaneous preterm delivery after laser surgery for twin-twin transfusion syndrome. Sci Rep. 2019 Mar 14; 9(1):4438. PMID: 30872799.
      View in: PubMed
    7. Pruetz JD, Miller JC, Loeb GE, Silka MJ, Bar-Cohen Y, Chmait RH. Prenatal diagnosis and management of congenital complete heart block. Birth Defects Res. 2019 May 01; 111(8):380-388. PMID: 30821931.
      View in: PubMed
    8. Ibirogba ER, Shazly SA, Chmait RH, Ruano R. Is there any role for fetoscopic laser ablation therapy in type-2 vasa previa? Ultrasound Obstet Gynecol. 2019 Feb 24. PMID: 30801796.
      View in: PubMed
    9. Sasso EB, Hardley MT, Bottura I, Korst LM, Ouzounian JG, Chmait RH. Characteristics of referred patients with twin-twin transfusion syndrome who did not undergo fetal therapy. Prenat Diagn. 2019 Mar; 39(4):280-286. PMID: 30698855.
      View in: PubMed
    10. Lapa Pedreira DA, Acacio GL, Gonçalves RT, Sá RAM, Brandt RA, Chmait RH, Kontopoulos EV, Quintero RA. Percutaneous fetoscopic closure of large open spina bifida using a bilaminar skin substitute. Ultrasound Obstet Gynecol. 2018 Oct; 52(4):458-466. PMID: 29314321.
      View in: PubMed
    11. Chon AH, Stein JE, Gerstenfeld T, Wang L, Vazquez WD, Chmait RH. The Use of Fetal Bronchoscopy in the Diagnosis and Management of a Suspected Obstructive Lung Mass. AJP Rep. 2018 Jul; 8(3):e195-e200. PMID: 30258699.
      View in: PubMed
    12. Chon AH, Chmait HR, Korst LM, Llanes A, Ouzounian JG, Chmait RH. Long-Term Outcomes After Thoracoamniotic Shunt for Pleural Effusions With Secondary Hydrops. J Surg Res. 2019 Jan; 233:304-309. PMID: 30502263.
      View in: PubMed
    13. Schrager S, Chmait RH, Vanderbilt DL. Response to Commentary by Saeid Safiri et al. J Matern Fetal Neonatal Med. 2018 Jul 09; 1. PMID: 29860913.
      View in: PubMed
    14. Bar-Cohen Y, Silka MJ, Hill AC, Pruetz JD, Chmait RH, Zhou L, Rabin SM, Norekyan V, Loeb GE. Minimally Invasive Implantation of a Micropacemaker Into the Pericardial Space. Circ Arrhythm Electrophysiol. 2018 Jul; 11(7):e006307. PMID: 29945929.
      View in: PubMed
    15. Hardley MT, Chon AH, Mestman J, Nguyen CT, Geffner ME, Chmait RH. Iodine-Induced Fetal Hypothyroidism: Diagnosis and Treatment with Intra-Amniotic Levothyroxine. Horm Res Paediatr. 2018; 90(6):419-423. PMID: 29791909.
      View in: PubMed
    16. Chon AH, Korst LM, Abdel-Sattar M, Llanes A, Ouzounian JG, Chmait RH. Types II and III congenital pulmonary airway malformation with hydrops treated in utero with percutaneous sclerotherapy. Prenat Diagn. 2018 06; 38(7):493-498. PMID: 29665020.
      View in: PubMed
    17. Chmait RH, Chon AH, Anselmo D, Vanderbilt DL, Townsend J, Julian-Wang B, Don D. In utero Fetal Intubation for a Large Neck Mass: A Minimally Invasive EXIT Option. Fetal Diagn Ther. 2019; 45(4):275-280. PMID: 29642057.
      View in: PubMed
    18. Quintero R, Chmait RH. Re: Monochorionic diamniotic twin pregnancy with selective fetal growth restriction Type II: sonographic and fetoscopic findings of poor prognosis. Ultrasound Obstet Gynecol. 2018 02; 51(2):280. PMID: 29417679.
      View in: PubMed
    19. Aboudiab MS, Chon AH, Korst LM, Llanes A, Ouzounian JG, Chmait RH. Management of twin-twin transfusion syndrome with an extremely short cervix. J Obstet Gynaecol. 2018 Apr; 38(3):359-362. PMID: 29374983.
      View in: PubMed
    20. Chon AH, Mamey MR, Schrager SM, Vanderbilt DL, Chmait RH. The relationship between preoperative fetal head circumference and 2-year cognitive performance after laser surgery for twin-twin transfusion syndrome. Prenat Diagn. 2018 02; 38(3):173-178. PMID: 29314091.
      View in: PubMed
    21. Chmait RH, Chon AH, Korst LM, Llanes A, Kontopoulos EV, Quintero RA. Risks of Preterm Premature Rupture of Membranes and Preterm Birth Post Fetoscopy Based on Location of Trocar Insertion Site. Am J Perinatol. 2018 Jul; 35(8):801-808. PMID: 29320800.
      View in: PubMed
    22. Abdel-Sattar M, Chon AH, Llanes A, Korst LM, Ouzounian JG, Chmait RH. Comparison of umbilical cord occlusion methods: Radiofrequency ablation versus laser photocoagulation. Prenat Diagn. 2018 01; 38(2):110-116. PMID: 29239485.
      View in: PubMed
    23. Uquillas KR, Aboudiab MS, Korst LM, Llanes A, Grubbs BH, Chmait RH. Middle Cerebral Artery Doppler Changes following Fetal Transfusion Performed with and without Fetal Anesthesia. Am J Perinatol. 2018 Jun; 35(7):682-687. PMID: 29228401.
      View in: PubMed
    24. H Chon A, Takeda MR, Felix JC, Chmait RH. A Complication of Percutaneous Sclerotherapy for Congenital Pulmonary Airway Malformation: Intravascular Injection and Cardiac Necrosis. Fetal Pediatr Pathol. 2017 Dec; 36(6):437-444. PMID: 29206544.
      View in: PubMed
    25. Gordon BJ, Chon AH, Korst LM, Llanes A, Miller DA, Chmait RH. Incidental Septostomy after Laser Surgery for Twin-Twin Transfusion Syndrome: Perinatal Outcomes and Antenatal Management. Fetal Diagn Ther. 2018; 44(4):285-290. PMID: 29207382.
      View in: PubMed
    26. Chon AH, Korst LM, Grubbs BH, Kontopoulos EV, Quintero RA, Chmait RH. Risk factors for fetomaternal bleeding after laser therapy for twin-twin transfusion syndrome. Prenat Diagn. 2017 12; 37(12):1232-1237. PMID: 29071724.
      View in: PubMed
    27. Chon AH, Korst LM, Assaf RD, Llanes A, Ouzounian JG, Chmait RH. Midtrimester isolated oligohydramnios in monochorionic diamniotic multiple gestations. J Matern Fetal Neonatal Med. 2019 Feb; 32(4):590-596. PMID: 28965437.
      View in: PubMed
    28. Uquillas KR, Grubbs BH, Prosper AE, Chmait RH, Grant EG, Walker DK. Doppler US in the Evaluation of Fetal Growth and Perinatal Health. Radiographics. 2017 Oct; 37(6):1831-1838. PMID: 29019748.
      View in: PubMed
    29. Chmait RH, Chon AH, Schrager SM, Llanes A, Hamilton AH, Vanderbilt DL. Neonatal cerebral lesions predict 2-year neurodevelopmental impairment in children treated with laser surgery for twin-twin transfusion syndrome. J Matern Fetal Neonatal Med. 2019 Jan; 32(1):80-84. PMID: 28835143.
      View in: PubMed
    30. Han M, Afshar Y, Chon AH, Scibetta E, Rao R, Chmait RH. Pseudoamniotic Band Syndrome Post Fetal Thoracoamniotic Shunting for Bilateral Hydrothorax. Fetal Pediatr Pathol. 2017 Aug; 36(4):311-318. PMID: 28453379.
      View in: PubMed
    31. Pruetz JD, Votava-Smith JK, Chmait HR, Korst LM, Llanes A, Chmait RH. Recipient Twin Circular Shunt Physiology Before Fetal Laser Surgery: Survival and Risks for Postnatal Right Ventricular Outflow Tract Obstruction. J Ultrasound Med. 2017 Aug; 36(8):1595-1605. PMID: 28370096.
      View in: PubMed
    32. Chon AH, Chavira ER, Wilson ML, Ingles SA, Llanes A, Chmait RH. The impact of laser surgery on angiogenic and anti-angiogenic factors in twin-twin transfusion syndrome: a prospective study. J Matern Fetal Neonatal Med. 2018 Apr; 31(8):1085-1091. PMID: 28320252.
      View in: PubMed
    33. Abdel-Sattar M, Chon A, Chen B, Burkhalter W, Chmait RH. Salvage of Necrotic-Appearing Limb after In Utero Endoscopic Lysis of Constriction Bands. AJP Rep. 2017 Apr; 7(2):e74-e78. PMID: 28428904.
      View in: PubMed
    34. Vest AN, Zhou L, Huang X, Norekyan V, Bar-Cohen Y, Chmait RH, Loeb GE. Design and Testing of a Transcutaneous RF Recharging System for a Fetal Micropacemaker. IEEE Trans Biomed Circuits Syst. 2017 04; 11(2):336-346. PMID: 28212097.
      View in: PubMed
    35. Zhou L, Bar-Cohen Y, Peck RA, Chirikian GV, Harwin B, Chmait RH, Pruetz JD, Silka MJ, Loeb GE. Analytical Modeling for Computing Lead Stress in a Novel Epicardial Micropacemaker. Cardiovasc Eng Technol. 2017 03; 8(1):96-105. PMID: 28070867.
      View in: PubMed
    36. Chon AH, de Oliveira GH, Lemley KV, Korst LM, Assaf RD, Chmait RH. Fetal Serum ß2-Microglobulin and Postnatal Renal Function in Lower Urinary Tract Obstruction Treated with Vesicoamniotic Shunt. Fetal Diagn Ther. 2017; 42(1):17-27. PMID: 27603215.
      View in: PubMed
    37. King JR, Conturie CL, Ouzounian JG, Korst LM, Llanes A, Chmait RH. Umbilical Cord Occlusion via Laser Coagulation in Monochorionic Multifetal Gestations before and after 20 Weeks of Gestation. Fetal Diagn Ther. 2017; 42(1):9-16. PMID: 27577884.
      View in: PubMed
    38. Chmait RH, Kontopoulos EV, Chon AH, Korst LM, Llanes A, Quintero RA. Amniopatch treatment of iatrogenic preterm premature rupture of membranes (iPPROM) after fetoscopic laser surgery for twin-twin transfusion syndrome. J Matern Fetal Neonatal Med. 2017 Jun; 30(11):1349-1354. PMID: 27686840.
      View in: PubMed
    39. Pedreira DA, Reece EA, Chmait RH, Kontopoulos EV, Quintero RA. Fetoscopic repair of spina bifida: safer and better? Ultrasound Obstet Gynecol. 2016 Aug; 48(2):141-7. PMID: 27273812.
      View in: PubMed
    40. Kontopoulos E, Chmait RH, Quintero RA. Twin-to-Twin Transfusion Syndrome: Definition, Staging, and Ultrasound Assessment. Twin Res Hum Genet. 2016 06; 19(3):175-83. PMID: 27203605.
      View in: PubMed
    41. Quintero RA, Kontopoulos E, Chmait RH. Laser Treatment of Twin-to-Twin Transfusion Syndrome. Twin Res Hum Genet. 2016 06; 19(3):197-206. PMID: 27203606.
      View in: PubMed
    42. Zhou L, Vest AN, Peck RA, Sredl JP, Huang X, Bar-Cohen Y, Silka MJ, Pruetz JD, Chmait RH, Loeb GE. Minimally invasive implantable fetal micropacemaker: mechanical testing and technical refinements. Med Biol Eng Comput. 2016 Dec; 54(12):1819-1830. PMID: 27021067.
      View in: PubMed
    43. Votava-Smith JK, Pitukcheewanont P, Randolph LM, Chmait RH. Generalized Arterial Calcification in a Recipient Twin: Discordant Fetal Hemodynamics Result in Differing Phenotypes in Monozygotic Twins with an ABCC6 Mutation. Fetal Diagn Ther. 2017; 41(3):234-236. PMID: 26982014.
      View in: PubMed
    44. Van Winden KR, Quintero RA, Kontopoulos EV, Korst LM, Llanes A, Chmait RH. Decreased Total Placental Mass Found in Twin-Twin Transfusion Syndrome Gestations with Selective Growth Restriction. Fetal Diagn Ther. 2016; 40(2):116-22. PMID: 26784929.
      View in: PubMed
    45. Agarwal R, Thornton ME, Fonteh AN, Harrington MG, Chmait RH, Grubbs BH. Amniotic fluid levels of phospholipase A2 in fetal rats with retinoic acid induced myelomeningocele: the potential "second hit" in neurologic damage. J Matern Fetal Neonatal Med. 2016 Sep; 29(18):3003-8. PMID: 26513600.
      View in: PubMed
    46. Chmait RH, Chon AH, Schrager SM, Llanes A, Hamilton A, Vanderbilt DL. Fetal brain-sparing after laser surgery for twin-twin transfusion syndrome appears associated with two-year neurodevelopmental outcomes. Prenat Diagn. 2016 Jan; 36(1):63-7. PMID: 26515250.
      View in: PubMed
    47. Pedreira DA, Zanon N, Nishikuni K, Moreira de Sá RA, Acacio GL, Chmait RH, Kontopoulos EV, Quintero RA. Endoscopic surgery for the antenatal treatment of myelomeningocele: the CECAM trial. Am J Obstet Gynecol. 2016 Jan; 214(1):111.e1-111.e11. PMID: 26386383.
      View in: PubMed
    48. Chmait RH, Chon AH, Schrager SM, Kontopoulos EV, Quintero RA, Vanderbilt DL. Donor catch-up growth after laser surgery for twin-twin transfusion syndrome. Early Hum Dev. 2015 Dec; 91(12):751-4. PMID: 26364515.
      View in: PubMed
    49. Moon-Grady AJ, Morris SA, Belfort M, Chmait R, Dangel J, Devlieger R, Emery S, Frommelt M, Galindo A, Gelehrter S, Gembruch U, Grinenco S, Habli M, Herberg U, Jaeggi E, Kilby M, Kontopoulos E, Marantz P, Miller O, Otaño L, Pedra C, Pedra S, Pruetz J, Quintero R, Ryan G, Sharland G, Simpson J, Vlastos E, Tworetzky W, Wilkins-Haug L, Oepkes D. International Fetal Cardiac Intervention Registry: A Worldwide Collaborative Description and Preliminary Outcomes. J Am Coll Cardiol. 2015 Jul 28; 66(4):388-99. PMID: 26205597.
      View in: PubMed
    50. Chmait RH, Kontopoulos EV, Jackson M, Horenstein J, Timor-Tritsch I, Quintero RA. Selective Reduction Using Intravascular Potassium Chloride Injection after Laser Surgery for Twin-Twin Transfusion Syndrome. Fetal Diagn Ther. 2016; 39(4):306-10. PMID: 26067899.
      View in: PubMed
    51. Pruetz JD, Schrager SM, Wang TV, Llanes A, Chmait RH, Vanderbilt DL. Blood pressure evaluation in children treated with laser surgery for twin-twin transfusion syndrome at 2-year follow-up. Am J Obstet Gynecol. 2015 Sep; 213(3):417.e1-7. PMID: 26003061.
      View in: PubMed
    52. Patel S, Quintero RA, Kontopoulos EV, Korst LM, Llanes A, Chmait RH. Abnormal umbilical artery Doppler findings in the recipient twin before laser surgery for twin-twin transfusion syndrome. J Ultrasound Med. 2015 May; 34(5):843-6. PMID: 25911718.
      View in: PubMed
    53. Kontopoulos E, Quintero R, Barrett J, Chmait R. Which twin is which? A proposed solution for the labeling of twins at birth. Am J Obstet Gynecol. 2015 Aug; 213(2):245-6. PMID: 25816785.
      View in: PubMed
    54. Bar-Cohen Y, Loeb GE, Pruetz JD, Silka MJ, Guerra C, Vest AN, Zhou L, Chmait RH. Preclinical testing and optimization of a novel fetal micropacemaker. Heart Rhythm. 2015 Jul; 12(7):1683-90. PMID: 25778431.
      View in: PubMed
    55. Peeters SH, Akkermans J, Westra M, Lopriore E, Middeldorp JM, Klumper FJ, Lewi L, Devlieger R, Deprest J, Kontopoulos EV, Quintero R, Chmait RH, Smoleniec JS, Otaño L, Oepkes D. Identification of essential steps in laser procedure for twin-twin transfusion syndrome using the Delphi methodology: SILICONE study. Ultrasound Obstet Gynecol. 2015 Apr; 45(4):439-46. PMID: 25504904.
      View in: PubMed
    56. Van Winden KR, Quintero RA, Kontopoulos EV, Korst LM, Llanes A, Chmait RH. Pre-Operative Twin Anemia/Polycythemia in the Setting of Twin-Twin Transfusion Syndrome (TTTS). Fetal Diagn Ther. 2015; 37(4):274-80. PMID: 25721425.
      View in: PubMed
    57. Van Winden KR, Quintero RA, Kontopoulos EV, Korst LM, Llanes A, Chmait RH. Perinatal survival in cases of twin-twin transfusion syndrome complicated by selective intrauterine growth restriction. J Matern Fetal Neonatal Med. 2015 Sep; 28(13):1549-53. PMID: 25184748.
      View in: PubMed
    58. Abdel-Sattar M, Platt LD, DeVore G, Porto M, Benirschke K, Chmait RH. Treatment of Complicated Spontaneous Twin Anemia-Polycythemia Sequence via Fetoscopic Laser Ablation of the Vascular Communications. Fetal Diagn Ther. 2015; 38(3):233-7. PMID: 25138968.
      View in: PubMed
    59. Chmait RH, Baskin JL, Carson S, Randolph LM, Hamilton A. Treatment of alpha(0)-thalassemia (--(SEA)/--(SEA)) via serial fetal and post-natal transfusions: Can early fetal intervention improve outcomes? Hematology. 2015 May; 20(4):217-22. PMID: 25116001.
      View in: PubMed
    60. Chmait RH, Kontopoulos E, Quintero R. Dual twin survival after laser surgery for twin-twin transfusion syndrome. Ultrasound Obstet Gynecol. 2014 Aug; 44(2):244. PMID: 25088513.
      View in: PubMed
    61. Patel S, Korst LM, Llanes A, Lee RH, Ouzounian JG, Chmait RH. Chorioamniotic membrane separation over the cervical os ("moon sign") in twin-twin transfusion syndrome. J Ultrasound Med. 2014 Jul; 33(7):1147-54. PMID: 24958400.
      View in: PubMed
    62. Jhun KM, Nassar P, Chen TS, Sardesai S, Chmait RH. Giant chorioangioma treated in utero via laser of feeding vessels with subsequent development of multifocal infantile hemangiomas. Fetal Pediatr Pathol. 2015 Feb; 34(1):1-8. PMID: 24941233.
      View in: PubMed
    63. Kunkle CM, Marchan J, Safadi S, Whitman S, Chmait RH. Chlorhexidine gluconate versus povidone iodine at cesarean delivery: a randomized controlled trial. J Matern Fetal Neonatal Med. 2015 Mar; 28(5):573-7. PMID: 24849000.
      View in: PubMed
    64. Chmait RH, Kontopoulos EV, Quintero RA. Sequential laser surgery for twin-twin transfusion syndrome. Am J Perinatol. 2014 Sep; 31 Suppl 1:S13-8. PMID: 24936936.
      View in: PubMed
    65. Chon AH, Korst LM, Llanes A, Miller DA, Ouzounian JG, Chmait RH. Midtrimester isolated polyhydramnios in monochorionic diamniotic multiple gestations. Am J Obstet Gynecol. 2014 Sep; 211(3):303.e1-5. PMID: 24858201.
      View in: PubMed
    66. Vanderbilt DL, Schrager SM, Llanes A, Hamilton A, Seri I, Chmait RH. Predictors of 2-year cognitive performance after laser surgery for twin-twin transfusion syndrome. Am J Obstet Gynecol. 2014 Oct; 211(4):388.e1-7. PMID: 24681290.
      View in: PubMed
    67. Pedreira DA, Zanon N, de Sá RA, Acacio GL, Ogeda E, Belem TM, Chmait RH, Kontopoulos E, Quintero RA. Fetoscopic single-layer repair of open spina bifida using a cellulose patch: preliminary clinical experience. J Matern Fetal Neonatal Med. 2014 Nov; 27(16):1613-9. PMID: 24299030.
      View in: PubMed
    68. Zhou L, Vest AN, Chmait RH, Bar-Cohen Y, Pruetz J, Silka M, Zheng K, Peck R, Loeb GE. A percutaneously implantable fetal pacemaker. Conf Proc IEEE Eng Med Biol Soc. 2014; 2014:4459-63. PMID: 25570982.
      View in: PubMed
    69. Johnston R, Shrivastava VK, Chmait RH. Term vaginal delivery following fetoscopic laser photocoagulation of type II vasa previa. Fetal Diagn Ther. 2014; 35(1):62-4. PMID: 24246791.
      View in: PubMed
    70. Chmait RH, Korst LM, Llanes A, Mullin P, Lee RH, Ouzounian JG. Perioperative characteristics associated with preterm birth in twin-twin transfusion syndrome treated by laser surgery. Am J Obstet Gynecol. 2013 Sep; 209(3):264.e1-8. PMID: 23747839.
      View in: PubMed
    71. Chen K, Chmait RH, Vanderbilt D, Wu S, Randolph L. Chimerism in monochorionic dizygotic twins: case study and review. Am J Med Genet A. 2013 Jul; 161A(7):1817-24. PMID: 23703979.
      View in: PubMed
    72. Quintero RA, Chmait R, Kontopoulos E. Laser treatment of twin-twin transfusion syndrome: what do the data really show? Am J Obstet Gynecol. 2013 Aug; 209(2):157-8. PMID: 23524169.
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    73. Rink BD, Gonik B, Chmait RH, O'Shaughnessy R. Maternal hemolysis after intravenous immunoglobulin treatment in fetal and neonatal alloimmune thrombocytopenia. Obstet Gynecol. 2013 Feb; 121(2 Pt 2 Suppl 1):471-3. PMID: 23344412.
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    74. Quintero RA, Kontopoulos EV, Quintero LF, Landy DC, Gonzalez R, Chmait RH. The observed vs. expected lung-to-head ratio does not correct for the effect of gestational age on the lung-to-head ratio. J Matern Fetal Neonatal Med. 2013 Apr; 26(6):552-7. PMID: 23046345.
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    75. Vanderbilt DL, Schrager SM, Llanes A, Chmait RH. Prevalence and risk factors of cerebral lesions in neonates after laser surgery for twin-twin transfusion syndrome. Am J Obstet Gynecol. 2012 Oct; 207(4):320.e1-6. PMID: 23021698.
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    76. Grubbs BH, Korst LM, Llanes A, Chmait RH. Middle cerebral artery Doppler and hemoglobin changes immediately following fetal transfusion. J Matern Fetal Neonatal Med. 2013 Jan; 26(2):155-7. PMID: 22937816.
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    77. Loeb GE, Zhou L, Zheng K, Nicholson A, Peck RA, Krishnan A, Silka M, Pruetz J, Chmait R, Bar-Cohen Y. Design and testing of a percutaneously implantable fetal pacemaker. Ann Biomed Eng. 2013 Jan; 41(1):17-27. PMID: 22855119.
      View in: PubMed
    78. Sosa-Sosa C, Bermúdez C, Chmait RH, Kontopoulos E, Córdoba Y, Guevara-Zuloaga F, Steffensen T, Quintero RA. Intraluminal tracheal occlusion using a modified 8-mm Z-stent in a sheep model of left-sided congenital diaphragmatic hernia. J Matern Fetal Neonatal Med. 2012 Nov; 25(11):2346-53. PMID: 22631591.
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    79. Schrey S, Huber A, Hecher K, Quintero R, Alkazaleh F, Moise KJ, Allbert JR, Schneider C, Palermo M, Yinon Y, Chmait RH, Windrim R, Ryan G. Vascular limb occlusion in twin-twin transfusion syndrome (TTTS): case series and literature review. Am J Obstet Gynecol. 2012 Aug; 207(2):131.e1-10. PMID: 22840724.
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    80. Shanske S, Naini A, Chmait RH, Akman HO, Mansukhani M, Lu J, Hirano M, DiMauro S. Mutation in an mtDNA protein-coding gene: prenatal diagnosis aided by fetal muscle biopsy. J Child Neurol. 2013 Feb; 28(2):264-8. PMID: 22532554.
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    81. Patel S, Randolph LM, Benirschke K, Llanes A, Yedigarova L, Chmait RH. Prevalence of noncardiac structural anomalies in twin-twin transfusion syndrome. J Ultrasound Med. 2012 Apr; 31(4):555-60. PMID: 22441911.
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    82. Joumblat N, Grubbs B, Chmait RH. Incidental fetoscopy during laparoscopy in pregnancy: management of perforation of the gravid uterus. Surg Laparosc Endosc Percutan Tech. 2012 Apr; 22(2):e76-8. PMID: 22487644.
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    83. Lee FL, Said N, Grikscheit TC, Shin CE, Llanes A, Chmait RH. Treatment of congenital pulmonary airway malformation induced hydrops fetalis via percutaneous sclerotherapy. Fetal Diagn Ther. 2012; 31(4):264-8. PMID: 22354268.
      View in: PubMed
    84. Zhou L, Chmait R, Bar-Cohen Y, Peck RA, Loeb GE. Percutaneously injectable fetal pacemaker: electrodes, mechanical design and implantation. Conf Proc IEEE Eng Med Biol Soc. 2012; 2012:6600-3. PMID: 23367442.
      View in: PubMed
    85. Nicholson A, Chmait R, Bar-Cohen Y, Zheng K, Loeb GE. Percutaneously injectable fetal pacemaker: electronics, pacing thresholds, and power budget. Conf Proc IEEE Eng Med Biol Soc. 2012; 2012:5730-3. PMID: 23367231.
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    86. Jones K, Tierney K, Grubbs BH, Pruetz JD, Detterich J, Chmait RH. Fetoscopic laser photocoagulation of feeding vessels to a large placental chorioangioma following fetal deterioration after amnioreduction. Fetal Diagn Ther. 2012; 31(3):191-5. PMID: 22086270.
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    87. Rossi AC, Vanderbilt D, Chmait RH. Neurodevelopmental outcomes after laser therapy for twin-twin transfusion syndrome: a systematic review and meta-analysis. Obstet Gynecol. 2011 Nov; 118(5):1145-50. PMID: 22015883.
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    99. Pathak B, Quintero R, Kontopoulos E, Assaf S, Miller D, Chmait RH. Postoperative middle cerebral artery peak systolic velocity changes confirm physiological principles of the sequential laser technique for twin-twin transfusion syndrome. Fetal Diagn Ther. 2010; 28(3):140-4. PMID: 20838031.
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    101. Quintero RA, Gomez Castro LA, Bermudez C, Chmait RH, Kontopoulos EV. In utero management of fetal lower urinary tract obstruction with a novel shunt: a landmark development in fetal therapy. J Matern Fetal Neonatal Med. 2010 Aug; 23(8):806-12. PMID: 19968590.
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    104. Chmait RH, Chavira E, Kontopoulos EV, Quintero RA. Third trimester fetoscopic laser ablation of type II vasa previa. J Matern Fetal Neonatal Med. 2010 May; 23(5):459-62. PMID: 19637106.
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    107. Rossi AC, Lee RH, Chmait RH. Emergency postpartum hysterectomy for uncontrolled postpartum bleeding: a systematic review. Obstet Gynecol. 2010 Mar; 115(3):637-44. PMID: 20177297.
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    108. Pathak B, Khan A, Assaf SA, Miller DA, Chmait RH. Amniopatch as a treatment for rupture of membranes following laser surgery for twin-twin transfusion syndrome. Fetal Diagn Ther. 2010; 27(3):134-7. PMID: 20090293.
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    109. Quintero R, Kontopoulos EV, Barness E, Steffensen TS, Hilbelink D, Chmait R, Benirschke K, Bornick PW. Twin-twin transfusion syndrome in a dichorionic-monozygotic twin pregnancy: The end of a paradigm? Fetal Pediatr Pathol. 2010 Jan; 29(2):81-8. PMID: 20334482.
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    112. Assaf SA, Khan A, Korst LM, Chmait RH. Fetal heart rate changes associated with sequential selective laser surgery for twin-twin transfusion syndrome. J Perinatol. 2010 Mar; 30(3):188-91. PMID: 19798041.
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    113. Pathak B, Benirschke K, Chmait RH. Umbilical artery hypoplasia in twin-twin transfusion syndrome complicated by discordant umbilical artery Doppler findings in the donor twin: a diagnostic dilemma. J Ultrasound Med. 2009 Aug; 28(8):1107-10. PMID: 19643797.
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    114. Pruetz JD, Chmait RH, Sklansky MS. Complete right heart flow reversal: pathognomonic recipient twin circular shunt in twin-twin transfusion syndrome. J Ultrasound Med. 2009 Aug; 28(8):1101-6. PMID: 19643796.
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    115. Chavira ER, Khan A, Korst LM, Miller D, Goodwin TM, Chmait RH. Are patients with twin-twin transfusion syndrome and a very short cervix candidates for laser surgery? J Ultrasound Med. 2009 May; 28(5):633-9. PMID: 19389902.
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    116. Chmait RH, Aghajanian P, Kontopoulos EV, Quintero RA. Prenatal diagnosis of spontaneous septostomy of the dividing membranes in complicated monochorionic diamniotic multiple gestations. J Ultrasound Med. 2009 May; 28(5):663-8. PMID: 19389906.
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    118. Barseghyan K, Jackson HA, Chmait R, De Filippo RE, Miller DA. Complementary roles of sonography and magnetic resonance imaging in the assessment of fetal urinary tract anomalies. J Ultrasound Med. 2008 Nov; 27(11):1563-9. PMID: 18946095.
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    123. Kontopoulos EV, Quintero RA, Chmait RH, Bornick PW, Russell Z, Allen MH. Percent absent end-diastolic velocity in the umbilical artery waveform as a predictor of intrauterine fetal demise of the donor twin after selective laser photocoagulation of communicating vessels in twin-twin transfusion syndrome. Ultrasound Obstet Gynecol. 2007 Jul; 30(1):35-9. PMID: 17587216.
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    124. Chmait RH, Rossi AC, Quintero RA. Paradoxical scalloped placenta with polyhydramnios in twin-twin transfusion syndrome. J Matern Fetal Neonatal Med. 2007 Jan; 20(1):29-32. PMID: 17437196.
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    125. Chang YL, Chmait RH, Bornick PW, Allen MH, Quintero RA. The role of laser surgery in dissecting the etiology of absent or reverse end-diastolic velocity in the umbilical artery of the donor twin in twin-twin transfusion syndrome. Am J Obstet Gynecol. 2006 Aug; 195(2):478-83. PMID: 16707082.
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    126. Quintero RA, Chmait RH, Murakoshi T, Pankrac Z, Swiatkowska M, Bornick PW, Allen MH. Surgical management of twin reversed arterial perfusion sequence. Am J Obstet Gynecol. 2006 Apr; 194(4):982-91. PMID: 16580287.
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    127. Chmait R, Pretorius D, Moore T, Hull A, James G, Nelson T, Jones M. Prenatal detection of associated anomalies in fetuses diagnosed with cleft lip with or without cleft palate in utero. Ultrasound Obstet Gynecol. 2006 Feb; 27(2):173-6. PMID: 16247756.
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    128. Quintero RA, Kontopoulos EV, Chmait R, Bornick PW, Allen M. Management of twin-twin transfusion syndrome in pregnancies with iatrogenic detachment of membranes following therapeutic amniocentesis and the role of interim amniopatch. Ultrasound Obstet Gynecol. 2005 Nov; 26(6):628-33. PMID: 16217744.
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    129. Quintero RA, Huhta J, Suh E, Chmait R, Romero R, Angel J. In utero cardiac fetal surgery: laser atrial septotomy in the treatment of hypoplastic left heart syndrome with intact atrial septum. Am J Obstet Gynecol. 2005 Oct; 193(4):1424-8. PMID: 16202736.
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    130. Chmait R, Dinise T, Moore T. Prospective observational study to establish predictors of glyburide success in women with gestational diabetes mellitus. J Perinatol. 2004 Oct; 24(10):617-22. PMID: 15152273.
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    131. Ishii K, Chmait RH, Martínez JM, Nakata M, Quintero RA. Ultrasound assessment of venous blood flow before and after laser therapy: approach to understanding the pathophysiology of twin-twin transfusion syndrome. Ultrasound Obstet Gynecol. 2004 Aug; 24(2):164-8. PMID: 15287054.
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    132. Nakata M, Martínez JM, Díaz C, Chmait R, Quintero RA. Intra-amniotic Doppler measurement of blood flow in placental vascular anastomoses in twin-twin transfusion syndrome. Ultrasound Obstet Gynecol. 2004 Jul; 24(1):102-3. PMID: 15229926.
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    133. Nakata M, Chmait RH, Quintero RA. Umbilical cord occlusion of the donor versus recipient fetus in twin-twin transfusion syndrome. Ultrasound Obstet Gynecol. 2004 May; 23(5):446-50. PMID: 15133793.
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    134. Quintero RA, Chmait RH. The cocoon sign: a potential sonographic pitfall in the diagnosis of twin - twin transfusion syndrome. Ultrasound Obstet Gynecol. 2004 Jan; 23(1):38-41. PMID: 14970997.
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    135. Daneshmand SS, Chmait RH, Moore TR, Bogic L. Preterm premature rupture of membranes: vascular endothelial growth factor and its association with histologic chorioamnionitis. Am J Obstet Gynecol. 2002 Nov; 187(5):1131-6. PMID: 12439490.
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    136. Chmait RH, Pretorius DH, Hull AD. Nasal glioma. Ultrasound Obstet Gynecol. 2002 Oct; 20(4):417-8. PMID: 12383332.
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    137. Chmait R, Pretorius D, Jones M, Hull A, James G, Nelson T, Moore T. Prenatal evaluation of facial clefts with two-dimensional and adjunctive three-dimensional ultrasonography: a prospective trial. Am J Obstet Gynecol. 2002 Oct; 187(4):946-9. PMID: 12388983.
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    138. Chmait RH, Hull AD. Doppler ultrasonographic evaluation of twins discordant for Rh alloimmunization. Am J Obstet Gynecol. 2002 Jul; 187(1):250-1. PMID: 12114922.
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    139. Chmait R, Franklin P, Spector SA, Hull AD. Protease inhibitors and decreased birth weight in HIV-infected pregnant women with impaired glucose tolerance. J Perinatol. 2002 Jul-Aug; 22(5):370-3. PMID: 12082471.
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    140. Chmait R, Hull A. Placental pathology casebook. Unusually large acardiac twin pregnancy at term. J Perinatol. 2001 Mar; 21(2):150-2. PMID: 11324364.
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    141. Chmait RH, Meimin DL, Koo CH, Huffaker J. Hemophagocytic syndrome in pregnancy. Obstet Gynecol. 2000 Jun; 95(6 Pt 2):1022-4. PMID: 10808012.
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