Cytomegalovirus IGM positive in the third month of pregnancy suggests timely termination of pregnancy. The third trimester of pregnancy is in the early stage of pregnancy, when the fetus is in the stage of rapid differentiation and development, and is more sensitive to external stimuli. A positive cytomegalovirus IGM in a pregnant woman’s body suggests that there is cytomegalovirus infection in her body, which may affect the growth and development of the fetus and lead to fetal malformations, and in order to avoid an adverse outcome of the pregnancy, it is generally recommended to terminate the pregnancy in a timely manner. In order to avoid adverse pregnancy outcomes, it is generally recommended to terminate the pregnancy promptly. Clinically, women should complete the eugenics five tests before preparing for pregnancy, which can clarify the presence of rubella virus, cytomegalovirus, toxoplasma gondii, herpes simplex virus, and other pathogenic microorganisms in the body of the woman, so as to avoid affecting the development of the fetus during the period of pregnancy. When the results of the labor and delivery test are abnormal, you should seek medical treatment in time to avoid delaying the condition, which may lead to an adverse pregnancy outcome.