Epidemiologic Studies

Adverse Pregnancy Outcomes Reporting System

The Adverse Pregnancy Outcomes Reporting System (APORS) collects information on Illinois infants born with birth defects or other abnormal conditions. The purpose of APORS is to conduct surveillance on birth defects, to guide public health policy in the reduction of adverse pregnancy outcomes, and to identify and refer children who require special services to correct and prevent developmental problems and other disabling conditions. Mandated statewide data collection began in August 1988. All licensed Illinois hospitals are required to report adverse pregnancy outcomes to APORS. In addition, APORS receives reports from two hospitals in St. Louis, Missouri, that are part of the southern Illinois perinatal network. A few Indiana and Iowa hospitals also voluntarily report Illinois children. APORS cases meet one of more of the following criteria:

Birth Defects Fact Sheet (PDF)

A fact sheet about the APORS program

Every Day in Illinois (PDF)

A snapshot of adverse outcomes and birth defects occurrence.


Selected topics of public health interest in birth defects and other conditions of the newborn

Public Use Data Files

Three datasets in ASCII format, providing  individual records for data analysis (de-identified to protect child confidentiality.)

Other Links

U.S. Centers for Disease Control (CDC) Folic Acid Education Program to Prevent Neural Tube Defects

U.S. Centers for Disease Control (CDC) National Center on Birth Defects and Developmental Disabilities


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