Collaborative Ambulatory Research Network (CARN)

The Collaborative Ambulatory Research Network (CARN) is comprised of a group of practicing ACOG Fellows who voluntarily participate in survey research on ambulatory care issues affecting Fellows of the American College of Obstetricians and Gynecologists (ACOG) and their patients. Electronic and mailed survey studies cover a variety of topics pertaining to perinatal health care and examine existing obstetrician/gynecologist knowledge, practices, and educational needs. Information from these studies has been used to develop better informed educational strategies, and to disseminate information to physicians in those areas in which a knowledge deficit is apparent.  Additionally, the findings of each survey study are submitted, in article form, to a peer-reviewed journal for publication.

The Expanded CARN was started in 2013 and consists of ACOG Fellows at sites across the United States that participate in practice-based maternal-child health studies using a three-fold approach. Each participating site collects 1) patient survey data; 2) medical provider survey data; and 3) medical record data regarding a specific topic. This approach allows for a research topic to be explored from multiple perspectives. Like CARN studies, the findings of each Expanded CARN study are submitted, in article form, to a peer-reviewed journal for publication. All site principal investigators that contribute to a given study are co-authors on resulting publications from that study.

Over 140 CARN and Expanded CARN studies have been completed from 1997 to 2017 on topics including: depression, anxiety, obesity, hormone therapy, fetal alcohol syndrome, spina bifida, post term pregnancy, food borne diseases (such as Listeriosis and Toxoplasma gondii), cystic fibrosis, thyroid disorder, cesarean delivery, multiple pregnancy, gestational weight gain, intimate partner violence, diabetes, hepatitis C virus, HIV, interactions with the pharmaceutical industry, and professional practice topics (such as liability, workload, continuing professional development, duty hours).

As of January 1, 2018, ACOG will no longer be hosting the CARN project. With ACOG’s approval, the CARN project (officially renamed the Pregnancy Related Care Research Network, or PRCRN) will transfer to the University of Washington School of Medicine.  While the focus of the PRCRN will be shifting toward the Expanded CARN (ECARN) model, with a focus on increasing the number of ECARN sites, the PRCRN will continue to conduct questionnaire survey studies as well. 

If you wish to participate in the PRCRN, please email Mike Power ( with the following information: 1) your name; 2) mailing address; and 3) preferred e-mail address.


Michael Power, PhD

Carrie Snead, MA


American College of Obstetricians and Gynecologists
409 12th Street SW, Washington, DC  20024-2188
Mailing Address: PO Box 96920, Washington, DC 20024-9998