Clinical Focus

  • Obstetrics
  • Obstetrics and Gynecology
  • Vulvodynia

Academic Appointments

Administrative Appointments

  • Assistant Clinical Professor, Obstetrics and Gynecology (1998 - Present)

Professional Education

  • Residency:Kaiser Found Hosp San Fran (1998) CA
  • Internship:Kaiser Found Hosp San Fran (1994) CA
  • Medical Education:Eastern VA Medical School (1993) VA
  • Board Certification: Obstetrics and Gynecology, American Board of Obstetrics and Gynecology (2001)

Research & Scholarship

Current Research and Scholarly Interests

Special interest in women with vulvodynia and other genital pain disorders.


2016-17 Courses


All Publications

  • Cesarean delivery outcomes after a prolonged second stage of labor AMERICAN JOURNAL OF OBSTETRICS AND GYNECOLOGY Sung, J. F., Daniels, K. I., Brodzinsky, L., El-Sayed, Y. Y., Caughey, A. B., Lyell, D. J. 2007; 197 (3)


    We hypothesized that prolonged second stage of labor increases the incidence of unintentional hysterotomy extensions at cesarean delivery.A retrospective cohort of term pregnant women who underwent primary cesarean delivery after failed second stage of labor at Stanford University was assessed for hysterotomy extensions and other maternal and neonatal morbidities. Groups included second stage length of 1-3 hours and >4 hours. Data were analyzed with the use of chi-square and Fisher's exact tests.Of the 239 women who were studied, the second stage of labor lasted 1-3 hours in 82 patients and >4 hours in 157 patients. Prolonged second stage of labor was associated with unintentional hysterotomy extensions (40% vs 26%; P = .03), particularly to the cervix (29% vs 5%; P = .005), and with surgery that lasted >90 minutes (9% vs 1%; P = .01). The incidence of hysterotomy extensions was associated positively with the length of the second stage. Other maternal and neonatal morbidities were similar between groups.Prolonged second stage of labor is associated with an increase in unintentional hysterotomy extensions at cesarean delivery and prolonged operative time. The future risk of hysterotomy extensions merits further investigation.

    View details for DOI 10.1016/j.ajog.2007.07.005

    View details for Web of Science ID 000249531300033

    View details for PubMedID 17826431