You can play with your cell phone occasionally in the fourth month of pregnancy, but be careful not to play for too long. The long time spent playing with the cell phone can easily cause eye strain and visual fatigue, and the long time spent sitting and playing with the cell phone is not conducive to blood circulation, which will lead to poor blood circulation in the uterus and will affect the blood circulation of the fetus, resulting in a certain impact on the growth and development of the fetus, and the long time spent playing with the cell phone will also produce a certain amount of radiation, which will also affect the fetus. In the fourth month of pregnancy, you should participate in outdoor sports in moderation, which is conducive to promoting blood circulation, usually pay attention to relaxation, enhance nutrition in moderation, pay attention to calcium supplementation, which is conducive to the growth and development of the fetus, usually eat more nutritious food, work and rest, can promote blood circulation.