If you can’t catch your breath while lying flat on your back in late pregnancy, you can choose to lie on your left side. If you still have the feeling of not being able to catch your breath even after adjusting your position, you need to consult a doctor in time to check for any cardiopulmonary diseases. Pregnant women in late pregnancy due to the gradual enlargement of the uterus, the bottom of the uterus pressure on the heart and lungs, resulting in pregnant women will be unable to catch their breath. When a pregnant woman lies down, the enlarged uterus presses on the vena cava of the lower abdomen, resulting in obstruction of blood circulation and aggravating the symptom of breathlessness. It is best to lie on the left side of the body during late pregnancy to improve the symptoms of breathlessness. If the symptoms of breathlessness are more serious and cannot be improved by adjusting the position, timely medical consultation is needed to check the cardiopulmonary function and exclude cardiopulmonary diseases. If there are abnormalities in cardiopulmonary function, you need to be treated under the guidance of a doctor to avoid serious consequences.