To determine whether a pregnant woman needs oxygen, you can look at it from the perspective of both the pregnant woman and the fetus. Oxygen is recommended for pregnant women with bad heart and edema, and oxygen is recommended for fetus with high fetal movement. 1. From the perspective of pregnant women: in late pregnancy, the burden on the pregnant woman’s heart will increase, and if her heart is not functioning well, she will have difficulty in breathing and will not be able to carry out physical activities, so she needs to inhale oxygen to relieve her symptoms. Some pregnant women in late pregnancy blood pressure will rise, lower limb edema is serious, can also be oxygen. 2. Fetal angle: pregnant women usually at home will carry out fetal movement monitoring, to determine whether the fetus is normal, if there is frequent fetal movement, suggesting that there may be fetal hypoxia manifestations, this time the need for oxygen. Pregnant women during pregnancy should pay attention to do a good job of prenatal checkups, actively listen to the advice of professional doctors to do a good job of comprehensive care and health care, pay attention to rest, at the same time should be relaxed, to avoid nervousness, anxiety, there is any discomfort should be timely to the hospital, by the doctor to make a clear diagnosis, and cooperate with the doctor to deal with the symptoms.