aPR: Prevalence ratio for ≥1 complication vs. none adjusted for age, region of residence and year at delivery; CI: Confidence interval; *Pregnancies lasting more than 20 gestational weeks. †Obstetric conditions include gestational diabetes; gestational hypertension, eclampsia or preeclampsia; hemorrhage; hysterectomy; infections including chorioamnionitis, endocarditis, endometritis, endomyometritis, metritis, pyelonephritis, and sepsis; maternal death; obstetric shock; placental abruption; placenta previa; premature rupture of membranes; preterm labor or preterm birth; and transfusion. ‡Cardiac conditions include atrial fibrillation, atrial flutter or supraventricular tachycardia; cardiomyopathy; conduction disorders; coronary dissection; heart failure; incident ventricular tachycardia, ventricular fibrillation, or sudden cardiac arrest; and myocardial infarction or ischemia. §Other conditions include acute renal failure; acute respiratory distress syndrome; anemia; deep vein thrombosis; disseminated intravascular coagulation; mechanical ventilation; pulmonary disease; pulmonary edema; pulmonary embolism; pulmonary hypertension; seizure disorders; stroke or cerebrovascular disorders; and thrombocytopenia.