In recent years, electromagnetic radiation has become the fourth major pollution after air pollution, water pollution and noise pollution. Many expectant mothers shy away from the word \”radiation.\” The following are the sources of electromagnetic radiation hidden around us. We line them up. Once expectant mothers understand this, they won’t panic too much! X-ray radiation index: X-ray is an electromagnetic wave with very short wavelength and strong penetrating ability. For pregnant mothers, if they receive too much X-ray radiation in the early stages of pregnancy, it can lead to severe fetal malformation, miscarriage or even stillbirth. The closer to the expected