Playing with the phone from pregnancy to birth has an effect on the pregnant mother, which in turn can affect the fetus, as follows. 1, pregnancy is divided into 3 stages: early pregnancy (before 14 weeks, usually said to be the first three months of pregnancy), middle pregnancy (before 14-28 weeks of pregnancy), late pregnancy (after 28 weeks). Early pregnancy is the period of fetal organ systems formation, including fertilized egg formation, fertilized egg implantation, embryonic organ differentiation and formation. It is a critical period for fetal development, and fetal malformation may occur if affected by adverse factors in the internal and external environment; the middle pregnancy (before 14-28 weeks) is a period for further growth and development of fetal organs and gradual maturation, and the influence of internal and external environmental factors during this period may lead to fetal growth and development limitation and abnormal organ development. Early and middle pregnancy is the key period to screen the fetus for malformation. 12 weeks of pregnancy ultrasound to measure the thickness of fetal subcutaneous fat behind the neck, 15-20 weeks of pregnancy for Down’s syndrome screening or non-invasive DNA testing, except for fetal chromosomal abnormalities, 20-24 weeks of pregnancy for dysmorphic ultrasound to understand the development of various fetal organs, except for malformations, 23-26 weeks of pregnancy for fetal heart Doppler ultrasound, except for fetal cardiovascular malformations. 2, cell phone screen is radiation: but the amount of radiation is low and will not affect the development of the fetus. In daily life, we are exposed to home appliances have radiation, including computers, TVs, refrigerators, microwave ovens, induction cookers, etc. Pay attention to protection when applying, and it is best not to use induction cookers and microwave ovens during pregnancy. Try not to contact with radiation during pregnancy, but because the disease requires the necessary radiological examination will not affect the fetus, and we do not need to fear, the radiation dose of ordinary radiological examination will not exceed the amount of teratogenic. 3, the impact on the pregnant mother: pregnant women are easy to fatigue, prone to tendinitis, need more rest, long-term play cell phone is easy to cause fatigue, damage to the eyes (dry eyes, soreness, orbital pain, vision loss), cervical spine, lumbar spine and hand joints, tendons, causing pain, pain itself is not conducive to rest and emotional stability of pregnant women, which in turn affects the growth and development of the fetus. All in all, playing with cell phones for a long time during pregnancy is not a good behavior and is not good for the development of the embryo and fetus.