Weekly thromboelastography can be performed in mid-pregnancy if there are abnormalities in the blood system, on the contrary, it is not necessary to perform weekly thromboelastography. Thromboelastography is not a mandatory checkup during pregnancy. During pregnancy, if the pregnant woman has pulmonary embolism, lower extremity arteriovenous thrombosis and other abnormalities of the blood system, it is necessary to check the thromboelastography weekly during mid-pregnancy, so as to understand the progress of the disease and facilitate timely diagnosis and treatment. In mid-pregnancy, if the pregnant woman does not have abnormal blood system lesions, her health condition is good, and all pregnancy tests are normal, weekly checkups of thromboelastography are not necessary. Pregnant women should choose whether or not to have a thromboelastogram on a case-by-case basis under the guidance of an obstetrician/gynecologist.