Naomi Greene

Dr. Greene developed a passion for Epidemiology while earning her Master of Public Health at UCLA. After spending the first 20 years of professional life as a high-risk obstetrics and gynecology research sonographer, she found that the discipline of Epidemiology would allow her to begin answering some of the many challenging questions that had arisen in her chosen field of maternal and child health and to supply the analytic tools needed to search for the answers in valid and reproducible ways. Her research has focused on early life origins of child health and disease, for the most part concentrating on prenatal exposure to maternal medications. In the course of these explorations, Dr. Greene has had access to large international administrative databases and cohorts, thus learning first-hand how to manage and optimize big datasets. 


  • PhD, Epidemiology, University of California, Los Angeles, CA
  • MPH, Community Health Sciences, University of California, Los Angeles, CA
  • BA, French Translation, University of California, Los Angeles, CA

Areas of Interest

Maternal and Child Health, Pregnancy, Prenatal, Reproductive Health, Pharmacoepidemiology.

Selected Publications

  • Ozimek JA, Greene N, Kilpatrick SJ. Lack of Association Between Race and Ethnicity and Timely Treatment of Severe Peripartum Hypertension. The Joint Commission Journal on Quality and Patient Safety,Volume 48, Issue 12,2022, pp:630-634 doi: 10.1016/j.jcjq.2022.08.007

  • Greene NH, Pon FF, Kilpatrick SJ. Race/ethnicity differences in response to acute antihypertensive treatment of peripartum severe hypertension. J Matern Fetal Neonatal Med. 2022 Aug 30:1-7. doi: 10.1080/14767058.2022.2116977. Epub ahead of print. PMID: 36042568.

  • Greene N, Schwartz N, Gregory KD. Association of Primary Cesarean Delivery Rate With Dissemination of Nurse-Specific Cesarean Delivery Rates. Obstet Gynecol 2022 (Oct);140:610–2.

  • Dellapiana G, Gupta M, Burwick RM, Greene N, Gregory KD. Elevated blood pressures during epidural placement are associated with increased risk of hypertensive disorders of pregnancy. J Matern Fetal Neonatal Med. 2022 Jan 25:1-6. doi: 10.1080/14767058.2022.2026918. Epub ahead of print. PMID: 35078390.

  • Saeb S, McCulloch J, Greene N, Korst LM, Fridman M, Gregory KD. The Childbirth Experience Survey (CBEX) and COVID-19: the ABCs of vaccine hesitancy in postpartum people. Am J Obstet Gynecol. 2022;226(1):S227-S228. doi:10.1016/j.ajog.2021.11.386

  • Greene N, Kilcoyne J, Grey A, Gregory KD. Method to Calculate Nurse-Specific Cesarean Rates for the First and Second Stages of Labor. J Obstet Gynecol Neonatal Nurs. 2021 Sep;50(5):632-641. doi: 10.1016/j.jogn.2021.06.008. Epub 2021 Jul 24. PMID: 34310902.

  • Edmonds JK, Woodbury SR, Lipsitz SR, Weiseth A, Farrell ME, Shah NT, Greene N, Gregory KD. Comparing Methods of Identifying Outlying Nurses in Audits of Low-Risk Cesarean Delivery Rates [published online ahead of print, 2021 Aug 24]. J Nurs Care Qual. 2021;10.1097/NCQ.0000000000000588. doi:10.1097/NCQ.0000000000000588

  • Fridman M, Korst LM, Reynen DJ, Nicholas LA, Greene N, Saeb S, Troyan JL, Gregory KD. Severe maternal morbidity in California hospitals: performance based on a validated multivariable prediction model. The Joint Commission Journal on Quality and Patient Safety 2021 Nov;47(11):686-695.\

  • Greene N, Kilcoyne J, Grey A, Gregory KD. A Method to Calculate Nurse-Specific Cesarean Rates for the First and Second Stages of Labor. JOGNN 2021;50:632–64.

  • Smithson SD, Greene NH, Esakoff TF. Risk factors for re-presentation for postpartum hypertension in patients without a history of hypertension or preeclampsia. Am J Obstet Gynecol MFM 2021;3:100297.

  • Korst LM, Gregory KD, Nicholas LA, Saeb S, Reynen DJ, Troyan JL, Greene N, Fridman M. A scoping review of severe maternal morbidity: describing risk factors and methodological approaches to inform population-based surveillance. Matern Health Neonatol Perinatol. 2021 Jan 6;7(1):3.

  • Greene NH, Kilpatrick SJ, Wong MS, Ozimek JA, Naqvi M. Impact of labor and delivery unit policy modifications on maternal and neonatal outcomes during the coronavirus disease 2019 pandemic. Am J Obstet Gynecol MFM. 2020 Nov;2(4):100234. doi: 10.1016/j.ajogmf.2020.100234. Epub 2020 Sep 21. PMID: 32984804; PMCID: PMC7505067.

  • Samimi P, Siedhoff S, Greene N, Wright K. Patient Discharge without an Order to Void in the Outpatient Gynecologic Surgery Setting. J Minim Invasive Gynecol . Jul-Aug 2020;27(5):1059-1062.  doi: 10.1016/j.jmig.2019.09.770.  Epub 2019 Sep 11.

  • Siedhoff MT, Wright KN, Misal MA, Molina AL, Greene NH. Postoperative Urinary Retention after Benign Gynecologic Surgery with a Liberal versus Strict Voiding Protocol. J Minim Invasive Gynecol. 2021;28(2):351-357. doi:10.1016/j.jmig.2020.07.002

  • Siedhoff MT, Wright KN, Misal MA, Molina AL, Greene NH. Postoperative Urinary Retention after Benign Gynecologic Surgery with a Liberal versus Strict Voiding Protocol. J Minim Invasive Gynecol. 2021;28(2):351-357. doi:10.1016/j.jmig.2020.07.002

  • Naqvi M, Burwick RM, Ozimek JA, Greene NH, Kilpatrick SJ, Wong MS. Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) Universal Testing Experience on a Los Angeles Labor and Delivery Unit [published online ahead of print, 2020 May 19]. Obstet Gynecol. 2020;10.1097/AOG.0000000000003987. doi:10.1097/AOG.0000000000003987

  • Govindappagari S, Greene N, Burwick R, Wong MS, Gregory KD. Maternal and Neonatal Morbidity After 4 and 6 Hours of Protracted Active Labor in Nulliparous Term Pregnancies. Obstet Gynecol. 2020;135(1):185-193. doi:10.1097/AOG.0000000000003587

  • Wong MS, Dellapiana G, Greene N, Gregory KD. Antibiotics during Intrauterine Balloon Tamponade Is Associated with a Reduction in Endometritis. Am J Perinatol. 2019 Mar 20. doi: 10.1055/s-0039-1683888. PMID: 30895582

  • Gupta M, Greene N, Kilpatrick SJ. Timely treatment of severe maternal hypertension and reduction in severe maternal morbidity. Pregnancy Hypertens. 2018 Oct;14:55-58. doi: 10.1016/j.preghy.2018.07.010. PMID: 30527119.

  • Gregory KD, Korst LM, Saeb S, McCulloch J, Greene N, Fink A, Fridman M. Childbirth-specific patient-reported outcomes as predictors of hospital satisfaction. Am J Obstet Gynecol. 2019 Feb;220(2):201.e1-201.e19. doi: 10.1016/j.ajog.2018.10.093.  PMID: 30403975

  • Korst LM, Fridman M, Saeb S, Greene N, Fink A, Gregory KD. The Development of a Conceptual Framework and Preliminary Item Bank for Childbirth-Specific Patient-Reported Outcome Measures. Health Serv Res. 2018 Oct;53(5):3373-3399. doi: 10.1111/1475-6773.12856. PMID: 29797513.

  • Churchill SJ, Wang ET, Akhlaghpour M, Goldstein EH, Eschevarria D, Greene N, Macer M, Zore T, Williams J 3rd, Pisarska MD. Mode of conception does not appear to affect placental volume in the first trimester. Fertil Steril. 2017 Jun;107(6):1341-1347.e1. doi: 10.1016/j.fertnstert.2017.04.010. Epub 2017 May 10. PMID: 28501362

  • Wang ET, Kathiresan ASQ, Bresee C, Greene N, Alexander C, Pisarska MD. Abnormal implantation after fresh and frozen in vitro fertilization cycles. Fertil Steril. 2017 May;107(5):1153-1158. doi: 10.1016/j.fertnstert.2017.03.012. Epub 2017 Apr 19. PMID: 28433367

  • Ozimek JA, Eddins RM, Greene N, Karagyozyan D, Pak S, Wong M, Zakowski M, Kilpatrick SJ. Opportunities for Improvement in Care Among Women with Severe Maternal Morbidity. Am J Obstet Gynecol. 2016 May 19. pii: S0002-9378(16)30217-4. doi: 10.1016/j.ajog.2016.05.022 [Epub ahead of print]  (PMID: 27210068). 
  • Kilpatrick SJ, Abreo A, Gould J, Greene N, Main EK. Confirmed severe maternal morbidity is associated with high rate of preterm delivery. Am J Obstet Gynecol. 2016 Feb 17. pii: S0002-9378(16)00314-8. doi: 10.1016/j.ajog.2016.02.026. [Epub ahead of print] (PMID: 26899903) 
  • Wang ET, Ozimek JA, Greene N, Ramos L, Vyas N, Kilpatrick SJ, Pisarska MD. Impact of fertility treatment on severe maternal morbidity. Fertil Steril. 2016 Apr 7. pii: S0015-0282(16)61046-4. doi: 10.1016/j.fertnstert.2016.03.039. [Epub ahead of print] (PMID: 27063600). 
  • Kilpatrick SJ, Abreo, Greene N, Melsop K, Peterson N, Shields LE, Main EK. Severe Maternal Morbidity in a Large Cohort of Women with Acute Severe Intrapartum Hypertension. Am J Obstet Gynecol. 2016 Jan 29. pii: S0002-9378(16)00226-X. doi: 10.1016/j.ajog.2016.01.176. [Epub ahead of print] PMID: 26829504. 
  • Main EK, Abreo A, McNulty J, Gilbert W, McNally Cm Poeltler D, Lanner-Cusin K, Fenton D, Gipps T, Melsop K, Greene N, et al. Measuring Severe Maternal Morbidity: Validation of Potential Measures. Am J Obstet Gynecol. 2015 Nov 12. pii: S0002-9378(15)02297-8. 
  • Greene N, Funch-Lassen, C, Rugbjerg K, Ritz B.  Female Reproductive Factors and Risk of Parkinson’s disease in Danish women. Eur J Neurol. 2014 Sep;21(9):1168-77. 
  • Greene N, Pedersen LH, Liu S, Olsen J.  Prenatal Prescription Corticosteroids and Offspring Diabetes: A National Cohort Study.  Int J Epidemiol. 2013 Feb;42(1):186-93. PMID 23382365 
  • Greene N, Greenland S, Olsen J, Aagard-Nohr E. The Impact of Loss to Followup in the Danish National Birth Cohort.  Epidemiol.2011;22(6):815-822. PMID 21918455