Of the millions of women who become pregnant in the United States each year, most can expect to have healthy pregnancies and deliveries. A small percentage of women, however, will develop pregnancy complications. A pregnancy complication is a health problem occurring during pregnancy that can potentially harm the mother, baby or both. Some women will also have health problems before becoming pregnant that can affect their pregnancy. Here are some common pregnancy complications our OB-GYN providers at SIU Medicine help pregnant women prevent and manage. Anemia Anemia happens when a pregnant