It is not harmful to be on the computer for a short period of time if you are pregnant, if you are pregnant for a long period of time and continuously on the computer, although the radiation itself does not have much effect on the pregnancy, sitting for a long period of time may affect the blood circulation of the pregnant woman. Ionizing radiation that is harmful to the human body and non-ionizing radiation that is not harmful to the human body. The more common ionizing radiation in our lives includes X-rays, CT and heavy metal radiation, which, if exposed to too much and exceeding a certain dosage, may cause genetic mutations and even invite cancer. Non-ionizing radiation, including our daily use of WIFI, infrared remote control of electrical appliances, sunlight, etc., these harm to the human body is minimal, the amount of radiation from cell phones and computers want to shake the health of the mother-to-be and the fetus baby, or a little difficult. In addition, as pregnant women face the computer office in a sitting position, less activity, lower extremity venous return obstacles, slow blood return, coupled with the pregnant woman’s own high coagulation state, easy to form lower extremity venous thrombosis. Therefore, pregnant women should avoid sitting in front of the computer for a long time, regular and appropriate activities.