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Cassandra Duffy | Education

Graduate School

Johns Hopkins Bloomberg School of Public Health

Baltimore, MD

Medical School

Washington University School of Medicine

St. Louis, MO

Internship

Obstetrics and Gynecology

New York Presbyterian Hospital, Columbia University

New York, NY

Residency

Obstetrics and Gynecology

New York Presbyterian Hospital - Columbia University

New York, NY

Fellowship

Maternal-Fetal Medicine

New York Presbyterian Hospital - Columbia University

New York, NY

Cassandra Duffy | Professional History

Dr. Duffy is a maternal-fetal medicine specialist at Beth Israel Deaconess Medical Center (BIDMC) and Harvard Medical School. She completed her residency in Obstetrics and Gynecology and fellowship in Maternal-Fetal Medicine at Columbia University. She also holds a Master’s of Public Health degree from Johns Hopkins Bloomberg School of Public Health. Her clinical interests include obstetric ultrasound, prenatal diagnosis and multifetal pregnancy, as well as resident and fellow education. In addition to her faculty position at BIDMC, she works in collaboration with the Fetal Care and Surgery Center at Boston Children's Hospital to provide consultations to patients with complex fetal conditions.

Cassandra Duffy | Publications

  1. Risk of hospitalization or death does not differ in children exposed to HIV, yet uninfected compared to nonexposed peers in Lusaka, Zambia. AIDS. 2025 Jul 01; 39(8):964-974. View Risk of hospitalization or death does not differ in children exposed to HIV, yet uninfected compared to nonexposed peers in Lusaka, Zambia. Abstract

  2. Lethal Skeletal Dysplasia in Fetus With Novel COL1A1 Variant. Prenat Diagn. 2024 10; 44(11):1412-1415. View Lethal Skeletal Dysplasia in Fetus With Novel COL1A1 Variant. Abstract

  3. Case report of recurrent vasa previa. Australas J Ultrasound Med. 2025 Feb; 28(1):e12405. View Case report of recurrent vasa previa. Abstract

  4. Preterm birth among women with HIV: impact of preconception cART initiation. AIDS. 2024 Oct 01; 38(12):1749-1757. View Preterm birth among women with HIV: impact of preconception cART initiation. Abstract

  5. Single-test syphilis serology: A case of not seeing the forest for the trees. PLoS One. 2024; 19(5):e0303253. View Single-test syphilis serology: A case of not seeing the forest for the trees. Abstract

  6. Diagnostic fetoscopy: important resource for prenatal assessment. Ultrasound Obstet Gynecol. 2024 02; 63(2):282-283. View Diagnostic fetoscopy: important resource for prenatal assessment. Abstract

  7. Perioperative Antibiotics and Other Factors Associated with Postcesarean Infections: A Case-Control Study. Am J Perinatol. 2024 05; 41(S 01):e520-e527. View Perioperative Antibiotics and Other Factors Associated with Postcesarean Infections: A Case-Control Study. Abstract

  8. Persistent Immune Activation in Human Immunodeficiency Virus-Infected Pregnant Women Starting Combination Antiretroviral Therapy After Conception. J Infect Dis. 2022 04 01; 225(7):1162-1167. View Persistent Immune Activation in Human Immunodeficiency Virus-Infected Pregnant Women Starting Combination Antiretroviral Therapy After Conception. Abstract

  9. Multifetal Gestations and Associated Perinatal Risks. Neoreviews. 2021 11; 22(11):e734-e746. View Multifetal Gestations and Associated Perinatal Risks. Abstract

  10. Lymphopenia and Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) Infection Among Hospitalized Obstetric Patients. Obstet Gynecol. 2020 08; 136(2):229-231. View Lymphopenia and Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) Infection Among Hospitalized Obstetric Patients. Abstract

  11. A multidisciplinary telemedicine model for management of coronavirus disease 2019 (COVID-19) in obstetrical patients. Am J Obstet Gynecol MFM. 2020 11; 2(4):100180. View A multidisciplinary telemedicine model for management of coronavirus disease 2019 (COVID-19) in obstetrical patients. Abstract

  12. A randomized trial of the bactericidal effects of chlorhexidine vs povidone-iodine vaginal preparation. Am J Obstet Gynecol MFM. 2020 08; 2(3):100114. View A randomized trial of the bactericidal effects of chlorhexidine vs povidone-iodine vaginal preparation. Abstract

  13. Vancomycin during delivery hospitalizations for women with group B streptococcus. J Matern Fetal Neonatal Med. 2022 Mar; 35(5):898-906. View Vancomycin during delivery hospitalizations for women with group B streptococcus. Abstract

  14. Clindamycin, Gentamicin, and Risk of Clostridium difficile Infection and Acute Kidney Injury During Delivery Hospitalizations. Obstet Gynecol. 2020 01; 135(1):59-67. View Clindamycin, Gentamicin, and Risk of Clostridium difficile Infection and Acute Kidney Injury During Delivery Hospitalizations. Abstract

  15. Antibiotics for 3rd and 4th Degree Vaginal Lacerations, Uterine Tamponade, and Manual Placental Extraction. Am J Perinatol. 2020 01; 37(1):92-103. View Antibiotics for 3rd and 4th Degree Vaginal Lacerations, Uterine Tamponade, and Manual Placental Extraction. Abstract

  16. Antibiotic Use Without Indication During Delivery Hospitalizations in the United States. Obstet Gynecol. 2019 10; 134(4):718-725. View Antibiotic Use Without Indication During Delivery Hospitalizations in the United States. Abstract

  17. Incorporating Precesarean Vaginal Preparation Into Standard of Care for Obstetrics. Obstet Gynecol. 2019 04; 133(4):707-711. View Incorporating Precesarean Vaginal Preparation Into Standard of Care for Obstetrics. Abstract

  18. Outcomes research on obstetric venous thromboembolism. Semin Perinatol. 2019 06; 43(4):194-199. View Outcomes research on obstetric venous thromboembolism. Abstract

  19. Oral Opioid Use during Vaginal Delivery Hospitalizations. Am J Perinatol. 2020 03; 37(4):390-397. View Oral Opioid Use during Vaginal Delivery Hospitalizations. Abstract

  20. Malpresentation in low- and middle-income countries: Associations with perinatal and maternal outcomes in the Global Network. Acta Obstet Gynecol Scand. 2019 03; 98(3):300-308. View Malpresentation in low- and middle-income countries: Associations with perinatal and maternal outcomes in the Global Network. Abstract

  21. Trends and Outcomes Associated With Using Long-Acting Opioids During Delivery Hospitalizations. Obstet Gynecol. 2018 10; 132(4):937-947. View Trends and Outcomes Associated With Using Long-Acting Opioids During Delivery Hospitalizations. Abstract

  22. Influence of treatment center and hospital volume on survival for locally advanced cervical cancer. Gynecol Oncol. 2015 Dec; 139(3):506-12. View Influence of treatment center and hospital volume on survival for locally advanced cervical cancer. Abstract

  23. Number of cervical examinations and risk of intrapartum maternal fever. Obstet Gynecol. 2012 Jun; 119(6):1096-101. View Number of cervical examinations and risk of intrapartum maternal fever. Abstract

  24. Effect of magnesium sulfate on fetal heart rate patterns in the second stage of labor. Obstet Gynecol. 2012 Jun; 119(6):1129-36. View Effect of magnesium sulfate on fetal heart rate patterns in the second stage of labor. Abstract

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