Pregnancy comorbidity is the combination of medical and surgical organ diseases during pregnancy, mainly in the following aspects: 1, the combination of heart disease during pregnancy (including heart disease before pregnancy and new heart disease after pregnancy); 2, the combination of endocrine system diseases: such as pregnancy combined with hyperthyroidism; 3, the combination of respiratory system diseases: such as pregnancy combined with pneumonia, combined with asthma; 4, the combination of hematological system diseases: such as pregnancy combined with thrombocytopenia, combined with leukemia; 5, the combination of gastrointestinal system diseases: such as pregnancy combined with cholecystitis, combined with gallbladder stones; 6, the combination of urinary system diseases: such as pregnancy combined with kidney stones, combined with nephritis, etc.