Pregnancy complications are any health issues that occur during pregnancy. Complications can range from mild to severe, and can involve both the mother and her baby. Some of the most common pregnancy complications include preterm labor and delivery, preeclampsia, gestational diabetes, placental abruption, and infection. Preterm labor and delivery occurs when a woman goes into labor too soon, before the 37th week of pregnancy. This can lead to complications in the baby, such as underdeveloped lungs and other organs, difficulty in breathing, and an increased risk of infection. Preeclampsia is a serious condition that can occur in pregnant women, usually during the second half of pregnancy. It is characterized by high blood pressure and protein in the urine. Preeclampsia can cause premature delivery or even stillbirth if left untreated. Gestational diabetes is a type of diabetes that develops during pregnancy. It occurs when the body does not produce enough insulin to meet the needs of the growing fetus. Gestational diabetes can cause complications in the baby, including birth defects, macrosomia (large size at birth), and jaundice.