Security screening usually has no effect on pregnant women, and the main reasons involve the security screening method, radiation dose, the principle of security screening equipment, human tolerance, scientific research conclusions, etc.

1. Security check methodCommon security screening methods include metal detector security, X-ray baggage security and millimeter wave human body security. Metal detectors mainly use the principle of electromagnetic induction to detect metal objects, which produces an alternating magnetic field, not ionizing radiation, low energy, and will not cause harm to the human body, including pregnant women.

2. Radiation doseAlthough X-ray baggage screening machine uses X-rays, the equipment itself has strict protective measures, and under normal circumstances, the X-ray leakage dose is very small. Moreover, pregnant women only stay near the security screening machine for a short time, and are exposed to radiation doses that are far below the threshold for harm to the human body. Millimeter-wave human security uses millimeter-wave interactions with the human body to image, with very low radiation energy and no adverse effects on pregnant women and fetuses.

3. The principle of security inspection equipment: Metal detectors work by detecting the properties of metal objects that change the surrounding magnetic field, which has no destructive effect on the structure and function of human cells. The X-ray baggage screening machine is to image the inside of the baggage, and its rays are strictly controlled inside the security screening machine, and only a very small amount may leak when the baggage enters and exits, but this dose is safe. Millimeter-wave human security screening is to generate images by receiving millimeter-wave signals reflected by the human body, and will not ionize human tissues.

4. Human tolerance: The human body itself has a certain self-repair and protection mechanism. The very small amount of non-ionizing radiation or low-dose radiation that the human body is exposed to during the security screening process can withstand and does not have significant biological effects. Although the pregnant woman's body is in a special physiological state, the impact of the security check is still within the tolerable range.

5. Conclusions of scientific researchA large number of scientific research and practical experience have shown that in the normal security environment, the radiation or magnetic field generated by various security equipment will not cause adverse pregnancy outcomes such as miscarriage and fetal malformation in pregnant women. There are also relevant international safety standards and norms to ensure the safety of security equipment.

To sum up, from the perspective of security screening methods, radiation doses, the principle of security screening equipment, human tolerance, and scientific research conclusions, security screening usually has no effect on pregnant women. Pregnant women do not need to worry too much when they go through the security check, but if the pregnant woman is under great psychological pressure, she can also explain the situation to the security personnel and take other appropriate security check methods.

This article is only for health science popularization and does not constitute medication or medical guidelines, it is recommended to seek medical attention in time if you have health problems.