Routine laboratory tests such as routine blood and urine tests and blood sugar tests have no effect on the foetus.
Single doses of chest X-rays and chest CT examinations during pregnancy are not harmful to the fetus and are far below the exposure doses that may cause adverse fetal prognosis. However, it has also been suggested that diagnostic doses in early pregnancy may have an effect. Therefore, diagnostic tests should only be considered during pregnancy if the diagnostic benefit outweighs the risk and after informed consent from the pregnant woman and family. Enhanced CT and enhanced MRI are not recommended during pregnancy. ECG and TCD (transcranial Doppler cerebrovascular ultrasound) have the advantage of being non-invasive and radiation-free and have no effect on the foetus.
If a CT or MRI is necessary in the middle or late stages of pregnancy, the doctor will protect the pregnant woman’s abdomen to reduce or avoid radiation exposure to the foetus.
In addition, if a pregnant woman’s symptoms are severe, the test can be performed under medical supervision if necessary.