T-wave changes on ECG in a pregnant woman at 7 months may be physiologic changes, may be caused by heart disease, and need to be identified in the context of the patient’s specific situation. T-wave changes on ECG in pregnant women at 7 months are also relatively common. Pregnant women with T-wave changes can not worry too much if they do not have any underlying disease themselves and do not have symptoms such as chest tightness or panic. If the pregnant woman is nervous during the examination, T-wave changes may also occur, so she can be rechecked after a period of time. If a pregnant woman’s ECG shows T-wave changes, accompanied by panic, chest tightness and other discomforts, or if the pregnant woman has hypertensive disorders of pregnancy, gestational diabetes and other pregnancy diseases, further cardiac ultrasound is needed to check whether the pregnant woman has organic lesions of the heart. Pregnant women who have abnormalities during pregnancy tests need to seek medical attention in a timely manner and deal with them under the guidance of a doctor.