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Joseph G Ouzounian, MD

Chair of Obstetrics and Gynecology

Daniel R Mishell, MD, Professor of Obstetrics & Gynecology (Clinical Scholar)

President of USC Care

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Phone +1 323 409 3416
Email jouzouni@usc.edu
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Overview

Joseph Ouzounian, MD, MBA is the Daniel R. Mishell Jr. MD Endowed Professor and Chair of the Department of Obstetrics and Gynecology at the Keck School of Medicine of USC. Dr. Ouzounian received his MD degree from USC, and completed his residency in obstetrics and gynecology and his fellowship in maternal-fetal medicine at USC. Subsequently, Dr. Ouzounian also earned a Master of Business Administration from the Marshall School of Business at USC. Dr. Ouzounian is board certified in both obstetrics and gynecology and maternal-fetal medicine. At the University he is actively involved in research, teaching, and clinical practice, in addition to his various leadership and strategic development roles. He has published extensively in scholarly medical journals and textbooks on topics in high risk obstetrics and perinatal medicine.

Recognized as a leader in perinatal medicine, Dr. Ouzounian lectures frequently at national and international meetings on topics in high risk obstetrics.

Publications

  • Introduction of advanced maternal age based on mortality-specific severe morbidity Int J Gynaecol Obstet. 2025 Mar; 168(3):1328-1331. . View in PubMed
  • Trends, characteristics, and outcomes of pregnancy in women with attention-deficit hyperactivity disorder: A nationwide analysis Eur J Obstet Gynecol Reprod Biol. 2025 Mar; 306:226-232. . View in PubMed
  • Distinct obstetrical characteristics and maternal mortality in patients with hemolysis, elevated liver enzymes, and low platelet count syndrome vs severe preeclampsia: a response Am J Obstet Gynecol. 2025 Mar; 232(3):e118. . View in PubMed
  • Nationwide Assessment of Gestational Age Distribution at Delivery for Patients With Placenta Accreta Spectrum Disorder Obstet Gynecol. 2025 Feb 20. . View in PubMed
  • Variable clinical and gynecologic characteristics associated with anatomical site of ectopic pregnancy Int J Gynaecol Obstet. 2025 Jan; 168(1):393-396. . View in PubMed
  • National-level assessment of gestational carrier pregnancies in the United States J Assist Reprod Genet. 2025 Jan; 42(1):201-211. . View in PubMed
  • Distinct obstetrical characteristics and maternal mortality in patients with HELLP syndrome vs severe preeclampsia Am J Obstet Gynecol. 2024 Dec; 231(6):e215-e221. . View in PubMed
  • Temporal trends of obstetric hemorrhage and product-specific blood transfusion at time of delivery Am J Obstet Gynecol. 2024 Oct; 231(4):e139-e145. . View in PubMed
  • Pregnancy with endometriosis: Assessment of national-level trends, characteristics, and maternal morbidity at delivery Eur J Obstet Gynecol Reprod Biol. 2024 Aug; 299:1-11. . View in PubMed
  • Assessment of obstetric characteristics and outcomes associated with pregnancy with Turner syndrome Fertil Steril. 2024 Aug; 122(2):233-242. . View in PubMed
  • Obstetric outcomes of women with congenital uterine anomalies in the United States Am J Obstet Gynecol MFM. 2024 Aug; 6(8):101396. . View in PubMed
  • Posterior reversible encephalopathy syndrome following eclampsia: assessment of clinical and pregnancy characteristics Am J Obstet Gynecol. 2024 07; 231(1):e19-e25. . View in PubMed
  • Cesarean hysterectomy for placenta accreta spectrum: Surgeon specialty-specific assessment Gynecol Oncol. 2024 07; 186:85-93. . View in PubMed
  • Obstetric Characteristics and Outcomes of Gestational Carrier Pregnancies: A Systematic Review and Meta-Analysis JAMA Netw Open. 2024 07 01; 7(7):e2422634. . View in PubMed
  • Contraception and sterilization selection at delivery among pregnant patients with malignancy Acta Obstet Gynecol Scand. 2024 Apr; 103(4):695-706. . View in PubMed
  • Pregnancy following assisted reproductive technology in morbidly obese patients: assessment of feto-maternal outcomes J Assist Reprod Genet. 2024 Apr; 41(4):903-914. . View in PubMed
  • Assessment of uterine rupture in placenta accreta spectrum: pre-labor vs in-labor Am J Obstet Gynecol. 2024 03; 230(3):e14-e16. . View in PubMed
  • Pregnant patients with respiratory syncytial virus infection: assessment of characteristics and maternal morbidity at delivery AJOG Glob Rep. 2024 Feb; 4(1):100289. . View in PubMed
  • Pregnant patients undergoing cholecystectomy: nationwide assessment of clinical characteristics and outcomes AJOG Glob Rep. 2024 Feb; 4(1):100310. . View in PubMed
  • The association of maternal obesity and obstetric anal sphincter injuries at time of vaginal delivery AJOG Glob Rep. 2023 Nov; 3(4):100272. . View in PubMed
  • Assessment of abnormal placentation in pregnancies conceived with assisted reproductive technology Int J Gynaecol Obstet. 2023 Nov; 163(2):555-562. . View in PubMed
  • Placenta previa percreta with surrounding organ involvement: a proposal for management Int J Gynecol Cancer. 2023 10 02; 33(10):1633-1644. . View in PubMed
  • Assessment of placenta accreta spectrum at vaginal birth after cesarean delivery Am J Obstet Gynecol MFM. 2023 10; 5(10):101115. . View in PubMed
  • Pregnancy with retained intrauterine device: national-level assessment of characteristics and outcomes Am J Obstet Gynecol MFM. 2023 09; 5(9):101056. . View in PubMed
  • Incidence, characteristics, and maternal outcomes of pregnancy with uterine prolapse Am J Obstet Gynecol MFM. 2023 08; 5(8):101020. . View in PubMed
  • Incidence trends of shoulder dystocia and associated risk factors: A nationwide analysis in the United States Int J Gynaecol Obstet. 2023 Aug; 162(2):578-589. . View in PubMed
  • Trends, Characteristics, and Maternal Morbidity Associated With Unhoused Status in Pregnancy JAMA Netw Open. 2023 07 03; 6(7):e2326352. . View in PubMed
  • The association between uterine adenomyosis and adverse obstetric outcomes: A propensity score-matched analysis Acta Obstet Gynecol Scand. 2023 07; 102(7):833-842. . View in PubMed
  • Unsuspected placenta accreta spectrum at vaginal delivery: assessment of incidence, characteristics, and maternal morbidity Am J Obstet Gynecol MFM. 2023 05; 5(5):100805. . View in PubMed
  • Trends of preterm delivery in the United States, 2016-2019 AJOG Glob Rep. 2023 May; 3(2):100181. . View in PubMed
  • Severe Maternal Morbidity and Mortality of Pregnant Patients With COVID-19 Infection During the Early Pandemic Period in the US JAMA Netw Open. 2023 04 03; 6(4):e237149. . View in PubMed
  • Pregnancy characteristics and outcomes after bariatric surgery: national-level analysis in the United States Surg Obes Relat Dis. 2023 04; 19(4):364-373. . View in PubMed
  • Prevalence of anxiety and depressive disorders in pregnant women with malignancy Int J Gynaecol Obstet. 2023 Feb; 160(2):635-640. . View in PubMed
  • Uptake of postplacental intrauterine device placement at cesarean delivery AJOG Glob Rep. 2023 Feb; 3(1):100157. . View in PubMed
  • Prior vertical uterine incision: Effect on subsequent pregnancy characteristics and outcomes Int J Gynaecol Obstet. 2023 Jan; 160(1):85-92. . View in PubMed
  • Patient characteristics of contraception and sterilization selection at vaginal delivery F S Rep. 2022 Dec; 3(4):361-365. . View in PubMed
  • Temporal trends of cesarean delivery on maternal request in the United States, 2016-2019 Eur J Obstet Gynecol Reprod Biol. 2022 Dec; 279:77-83. . View in PubMed
  • Gynecologic oncologists in surgery for placenta accreta spectrum: a survey for practice, experience, and interest Int J Gynecol Cancer. 2022 11 07; 32(11):1433-1442. . View in PubMed
  • Association of Pregnancy Characteristics and Maternal Mortality With Amniotic Fluid Embolism JAMA Netw Open. 2022 11 01; 5(11):e2242842. . View in PubMed
  • Association of severe maternal morbidity and post-traumatic stress disorder AJOG Glob Rep. 2022 Nov; 2(4):100111. . View in PubMed
  • Shift in delivery timing of placenta accreta spectrum: Influence of a society-based recommendation Eur J Obstet Gynecol Reprod Biol. 2022 10; 277:124-125. . View in PubMed
  • Trends, characteristics, and outcomes of conservative management for placenta percreta Arch Gynecol Obstet. 2022 09; 306(3):913-920. . View in PubMed
  • Assessment of Severe Maternal Morbidity and Mortality in Pregnancies Complicated by Cancer in the US JAMA Oncol. 2022 08 01; 8(8):1213-1216. . View in PubMed
  • Zika virus infection and pregnancy outcomes in the United States, 2017-2019 Int J Gynaecol Obstet. 2022 07; 158(1):223-224. . View in PubMed
  • Racial and ethnic disparity in characteristics and outcomes of women with placenta accreta spectrum: a comparative study Reprod Sci. 2022 07; 29(7):1988-2000. . View in PubMed
  • Hospital surgical volume-outcome relationship in caesarean hysterectomy for placenta accreta spectrum BJOG. 2022 05; 129(6):986-993. . View in PubMed
  • Selective intrauterine growth restriction (SIUGR) type II: proposed subclassification to guide surgical management J Matern Fetal Neonatal Med. 2022 Mar; 35(6):1184-1191. . View in PubMed
  • Amylase concentration and activity in the amniotic fluid of fetal rats with retinoic acid induced myelomeningocele J Matern Fetal Neonatal Med. 2022 Jan; 35(1):147-154. . View in PubMed
  • Utilizations and outcomes of intra-arterial balloon occlusion at cesarean hysterectomy for placenta accreta spectrum Acta Obstet Gynecol Scand. 2021 Dec; 100(12):2234-2243. . View in PubMed
  • Trends, characteristics, and outcomes of placenta accreta spectrum: a national study in the United StatesAm J Obstet Gynecol. 2021 11; 225(5):534. e1-534. e38. . View in PubMed
  • Decreasing Failure-to-Rescue From Severe Maternal Morbidity at Cesarean Delivery: Recent US Trends JAMA Surg. 2021 06 01; 156(6):585-587. . View in PubMed
  • Evaluation and Management of Fetal Macrosomia Obstet Gynecol Clin North Am. 2021 Jun; 48(2):387-399. . View in PubMed
  • Implementation of multidisciplinary practice change to improve outcomes for women with placenta accreta spectrum Eur J Obstet Gynecol Reprod Biol. 2020 Mar; 246:194-196. . View in PubMed
  • Fetoscopic Laser Ablation Therapy for Type II Vasa Previa Fetal Diagn Ther. 2020; 47(9):682-688. . View in PubMed
  • Characteristics of referred patients with twin-twin transfusion syndrome who did not undergo fetal therapy Prenat Diagn. 2019 03; 39(4):280-286. . View in PubMed
  • Midtrimester isolated oligohydramnios in monochorionic diamniotic multiple gestations J Matern Fetal Neonatal Med. 2019 Feb; 32(4):590-596. . View in PubMed
  • Long-Term Outcomes After Thoracoamniotic Shunt for Pleural Effusions With Secondary Hydrops J Surg Res. 2019 01; 233:304-309. . View in PubMed
  • Types II and III congenital pulmonary airway malformation with hydrops treated in utero with percutaneous sclerotherapy Prenat Diagn. 2018 06; 38(7):493-498. . View in PubMed
  • Management of twin-twin transfusion syndrome with an extremely short cervix J Obstet Gynaecol. 2018 Apr; 38(3):359-362. . View in PubMed
  • Comparison of umbilical cord occlusion methods: Radiofrequency ablation versus laser photocoagulation Prenat Diagn. 2018 01; 38(2):110-116. . View in PubMed
  • Awaiting blood pressure stabilization in ambulatory pregnant women: is 5? J Matern Fetal Neonatal Med. 2017 Aug; 30(16):1933-1937.. View in PubMed
  • 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. . View in PubMed
  • Shoulder Dystocia: Incidence and Risk Factors Clin Obstet Gynecol. 2016 12; 59(4):791-794. . View in PubMed
  • Clinical Risk Factors Do Not Predict Shoulder Dystocia J Reprod Med. 2016 Nov-Dec; 61(11-12):575-80. . View in PubMed
  • Non-specific red cell reactivity in an obstetric population J Matern Fetal Neonatal Med. 2016 Sep; 29(17):2848-51. . View in PubMed
  • Neonatal Outcomes by Mode of Delivery in Preterm Birth Am J Perinatol. 2015 Dec; 32(14):1292-7. . View in PubMed
  • Maternal and fetal signs and symptoms associated with uterine rupture in women with prior cesarean delivery J Matern Fetal Neonatal Med. 2015 Jul; 28(11):1270-1277. . View in PubMed
  • Midtrimester isolated polyhydramnios in monochorionic diamniotic multiple gestationsAm J Obstet Gynecol. 2014 Sep; 211(3):303. e1-5. . View in PubMed
  • A case-control review of placentas from patients with intrahepatic cholestasis of pregnancy Fetal Pediatr Pathol. 2014 Aug; 33(4):210-5. . View in PubMed
  • Chorioamniotic membrane separation over the cervical os (“moon sign”) in twin-twin transfusion syndrome J Ultrasound Med. 2014 Jul; 33(7):1147-54. . View in PubMed
  • Risk factors for neonatal brachial plexus palsy Semin Perinatol. 2014 Jun; 38(4):219-21. . View in PubMed
  • A comparison of obstetrical outcomes with labor induction agents used at term J Matern Fetal Neonatal Med. 2014 Apr; 27(6):592-6. . View in PubMed
  • Perioperative characteristics associated with preterm birth in twin-twin transfusion syndrome treated by laser surgeryAm J Obstet Gynecol. 2013 Sep; 209(3):264. e1-8. . View in PubMed
  • Thyroid disease and gestational diabetes mellitus (GDM): is there a connection? J Matern Fetal Neonatal Med. 2013 Jul; 26(11):1139-42.. View in PubMed
  • Bile acid concentration reference ranges in a pregnant Latina population Am J Perinatol. 2013 May; 30(5):389-93. . View in PubMed
  • Brachial plexus palsy and shoulder dystocia: obstetric risk factors remain elusive Am J Perinatol. 2013 Apr; 30(4):303-7. . View in PubMed
  • Alteration of endothelial function markers in women with gestational diabetes and their fetuses J Matern Fetal Neonatal Med. 2013 Mar; 26(5):507-12. . View in PubMed
  • Neonatal brachial plexus palsy with vaginal birth after cesarean delivery: a case-control studyAm J Obstet Gynecol. 2013 Mar; 208(3):229. e1-5. . View in PubMed
  • Severe brachial plexus palsy in women without shoulder dystociaIn reply. Obstet Gynecol. 2013 Mar; 121(3):686. . View in PubMed
  • In reply Obstet Gynecol. 2013 Jan; 121(1):191-2. . View in PubMed
  • Helicobacter pylori and thrombocytopenia in the pregnant hispanic population J Matern Fetal Neonatal Med. 2012 Dec; 25(12):2588-90. . View in PubMed
  • Increased composite maternal and neonatal morbidity associated with ultrasonographically suspected fetal macrosomia J Matern Fetal Neonatal Med. 2012 Oct; 25(10):1953-9. . View in PubMed
  • Severe brachial plexus palsy in women without shoulder dystocia Obstet Gynecol. 2012 Sep; 120(3):539-41. . View in PubMed
  • Physiologic changes during normal pregnancy and delivery Cardiol Clin. 2012 Aug; 30(3):317-29. . View in PubMed
  • Recurrent shoulder dystocia: analysis of incidence and risk factors Am J Perinatol. 2012 Aug; 29(7):515-8. . View in PubMed
  • A low-fidelity total abdominal hysterectomy teaching model for obstetrics and gynecology residents Simul Healthc. 2012 Apr; 7(2):123-6. . View in PubMed
  • Pre-pregnancy weight and excess weight gain are risk factors for macrosomia in women with gestational diabetes J Perinatol. 2011 Nov; 31(11):717-21. . View in PubMed
  • Vaginal birth after cesarean section: risk of uterine rupture with labor induction Am J Perinatol. 2011 Sep; 28(8):593-6. . View in PubMed
  • Late pregnancy complications can affect risk estimates of elective induction of labor J Matern Fetal Neonatal Med. 2011 Jun; 24(6):787-94. . View in PubMed
  • One-hour post-glucola results and pre-pregnancy body mass index are associated with the need for insulin therapy in women with gestational diabetes J Matern Fetal Neonatal Med. 2011 May; 24(5):718-22. . View in PubMed
  • Cervical length and delivery outcomes in patients with prophylactic cervical cerclage Am J Perinatol. 2011 Apr; 28(4):273-6. . View in PubMed
  • Posterior arm shoulder dystocia alleviated by the Zavanelli maneuver Am J Perinatol. 2010 Oct; 27(9):749-51. . View in PubMed
  • 2007 Jun; 196(6):595. e1-3; discussion 595. e3. . View in PubMed
  • Shoulder dystocia: the unpreventable obstetric emergency with empiric management guidelines Am J Obstet Gynecol. 2006 Sep; 195(3):657-72. . View in PubMed
  • A comparison of shoulder dystocia-associated transient and permanent brachial plexus palsies Obstet Gynecol. 2003 Sep; 102(3):544-8. . View in PubMed
  • The use of helical computed tomography in pregnancy for the diagnosis of acute appendicitis Am J Obstet Gynecol. 2001 Apr; 184(5):954-7. . View in PubMed
  • Brachial plexus palsy: an in utero injury? Am J Obstet Gynecol. 1999 May; 180(5):1303-7.. View in PubMed
  • Obstetric maneuvers for shoulder dystocia and associated fetal morbidity Am J Obstet Gynecol. 1998 Jun; 178(6):1126-30. . View in PubMed
  • Permanent Erb’s palsy: a lack of a relationship with obstetrical risk factors Am J Perinatol. 1998 Apr; 15(4):221-3. . View in PubMed
  • Symphyseal separation and transient femoral neuropathy associated with the McRoberts’ maneuver Am J Obstet Gynecol. 1998 Mar; 178(3):609-10. . View in PubMed
  • Spontaneous vaginal delivery: a risk factor for Erb’s palsy? Am J Obstet Gynecol. 1998 Mar; 178(3):423-7.. View in PubMed
  • Brachial plexus palsy associated with cesarean section: an in utero injury? Am J Obstet Gynecol. 1997 Nov; 177(5):1162-4.. View in PubMed
  • The accuracy of intrapartum ultrasonographic fetal weight estimation in diabetic pregnancies Am J Obstet Gynecol. 1997 Sep; 177(3):503-6. . View in PubMed
  • Ultrasonographic fetal cardiac measurement in isoimmunized pregnancies J Reprod Med. 1997 Jun; 42(6):342-6. . View in PubMed
  • The McRoberts’ maneuver for the alleviation of shoulder dystocia: how successful is it? Am J Obstet Gynecol. 1997 Mar; 176(3):656-61.. View in PubMed
  • Permanent Erb palsy: a traction-related injury? Obstet Gynecol. 1997 Jan; 89(1):139-41.. View in PubMed
  • Radiologic studies in acute fatty liver of pregnancyA review of the literature and 19 new cases. J Reprod Med. 1996 Nov; 41(11):839-43. . View in PubMed
  • Clinical significance of prenatal ultrasonographic intestinal dilatation in fetuses with gastroschisis Am J Obstet Gynecol. 1996 Oct; 175(4 Pt 1):982-4. . View in PubMed
  • Intrahepatic cholestasis of pregnancy: perinatal outcome associated with expectant management Am J Obstet Gynecol. 1996 Oct; 175(4 Pt 1):957-60. . View in PubMed
  • The nonreactive nonstress test: predictive value for neonatal anemia in the isoimmunized pregnancy Obstet Gynecol. 1996 Sep; 88(3):364-7. . View in PubMed
  • Clinical role of amnio-infusion Baillieres Clin Obstet Gynaecol. 1996 Jun; 10(2):259-72. . View in PubMed
  • Prognostic significance of antenatally detected fetal pyelectasis Ultrasound Obstet Gynecol. 1996 Jun; 7(6):424-8. . View in PubMed
  • Systemic vascular resistance index determined by thoracic electrical bioimpedance predicts the risk for maternal hypotension during regional anesthesia for cesarean delivery Am J Obstet Gynecol. 1996 Mar; 174(3):1019-25. . View in PubMed
  • Amnioinfusion in women with previous cesarean births: a preliminary report Am J Obstet Gynecol. 1996 Feb; 174(2):783-6. . View in PubMed
  • Disseminated intravascular coagulation and antithrombin III depression in acute fatty liver of pregnancy Am J Obstet Gynecol. 1996 Jan; 174(1 Pt 1):211-6. . View in PubMed
  • Peripheral primitive neuroectodermal tumor of the vulva Gynecol Oncol. 1994 Aug; 54(2):254-8. . View in PubMed
  • Noninvasive determination of cardiac output by thoracic electrical bioimpedance Crit Care Med. 1990 Jan; 18(1):121-2. . View in PubMed
  • Measurement of cardiac output in pregnancy by thoracic electrical bioimpedance and thermodilutionA preliminary report. Am J Obstet Gynecol. 1989 Sep; 161(3):680-4. . View in PubMed
  • 2005 Jun; 192(6):1933-5; discussion 1935-8. . View in PubMed

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