Pregnancy complications are medical issues that can arise during pregnancy, affecting the health of the mother or the baby. Common complications include gestational diabetes, which can lead to high blood sugar levels, and preeclampsia, characterized by high blood pressure and potential organ damage. These conditions may require careful monitoring and management to ensure a healthy pregnancy. Other complications can involve miscarriage, which is the loss of a pregnancy before 20 weeks, or preterm labor, where labor begins before 37 weeks of pregnancy. It's essential for expectant mothers to attend regular check-ups to identify and address any potential complications early.