A<unk>  is one where the mother or the fetus has an increased<unk>  of adverse outcomes compared to uncomplicated pregnancies. No concrete guidelines currently exist for distinguishing “high-risk” pregnancies from “low-risk” pregnancies, however there are certain studied conditions that have been shown to put the mother or fetus at a<unk> er<unk>  of poor outcomes. These conditions can be classified into three main categories: health problems in the mother that occur before she becomes pregnant, health problems in the mother that occur during pregnancy, and certain health conditions with the fetus. In 2012, the CDC estimated that there were approximately 65,000 pregnancies deemed "high-risk" in the United States.
High-risk pregnancy
Pre-existing disease in pregnancy
Teenage pregnancy
Male lactation
Abortion in Europe
Male pregnancy
Drugs in pregnancy
Postpartum infections