Abortion, Spontaneous

• University of Colorado, Denver School of Medicine, Department of Obstetrics and Gynecology — Denver, Colorado, United States
• Women's Health Research Center, Department of Social and Preventive Medicine, University at Buffalo — Buffalo, New York, United States
• Moses Taylor Hospital — Scranton, Pennsylvania, United States
• University of Utah Medical Center — Salt Lake City, Utah, United States

• Ain Shams University — Cairo, Egypt

• Hospital Federal dos Servidores do Estado — Rio de Janeiro, Brazil

Not specified

• Scientific Center for Family Health and Human Reproduction Problems — Irkutsk, Russia

• Brown University — Providence, Rhode Island, United States

• Penn Family Planning and Pregnancy Loss Center — Philadelphia, Pennsylvania, United States

• Azienda USL Ferrara — Ferrara, Italy

• The Ohio State University College of Medicine — Columbus, Ohio, United States

• Clinique Ovo — Montreal, Quebec, Canada