Department of Obstetrics and Gynecology, University of North Carolina, Chapel Hill, North Carolina; Reply OB/Gyn & Fertility, Cary, North Carolina; the Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland; the Guttmacher Institute, New York, New York; the Department of Epidemiology and Prevention, Wake Forest University School of Medicine, Winston-Salem, North Carolina; GreeneWorks, Washington, DC; and the Department of Family and Preventive Medicine, University of Utah, Salt Lake City, Utah.
Corresponding author: Rachel Peragallo Urrutia, MD, MS, Department of Obstetrics and Gynecology, University of North Carolina, CB#7570, Chapel Hill, NC 27599-7570; email: [email protected].
Funding for the review was provided through a USAID contract. KNDR Healthcare, LLC provided in-kind donation (EK effort). KNDR had no role in the design of the project or review of the data or manuscript. USAID provided funding starting after the design of the project, the literature search, the abstract review, and the full-text review. They had no role in design of the project or data analysis plan. USAID read the manuscript before publication and provided comments that the authors were not obligated to incorporate.
Presented at the North American Forum on Family Planning, October 14–16, 2017, Atlanta, Georgia; the National Title X Reproductive Health Conference, July 15–18, 2018, Kansas City, Missouri; and the Annual Scientific Assembly Meeting of the International Institute of Restorative Reproductive Medicine, July 25, 2018, Ontario, California.
Chelsea B. Polis is affiliated with the Guttmacher Institute. Her affiliation is included for informational purposes only; this work was not conducted under the auspices of the Guttmacher Institute. The views expressed herein are those of the authors and do not necessarily reflect the views of the Guttmacher Institute.
The authors thank Ammu Vijay and Nancy DeMaria for their help during the abstract and full-text screening portions of the study; Jennifer Walker, MLS, for her assistance with developing and conducting the literature search; and Eugene Urrutia, PhD, for his help with preparation of Figures 2 and 3.
Each author has indicated that he or she has met the journal's requirements for authorship.
Financial Disclosure Dr. Peragallo Urrutia's salary to the University of North Carolina is paid in part by KNDR Healthcare, LLC, for her work at Reply Ob/Gyn & Fertility. KNDR's mission is to promote fertility awareness–based methods of family planning. The other authors did not report any potential conflicts of interest.
