What are the risk factors for high risk pregnancies?

Threats to baby, mom. Risk factors include conditions that might affect the health of the fetus and/or pregnant woman. Those include higher chance for birth defects, >1 baby, prior preterm birth, diabetes, history of eclampsia. Many women at high risk for pregnancy complications have healthy babies, but they probably saw perinatologists, had extra testing or imaging, or underwent treatments or delivery with nicu aware.
High risk pregnancy. Risk factors for high risk pregnancy include chronic diseases, such as diabetes and high blood pressure; age, older age increases the risk; a prior premature birth or pregnancy complication in a previous pregnancy, and factors that aren't so easy to control, such as placenta previa, placental abruption, and pre-eclampsia early in pregnancy.