There is no specific rule on when to start taking oxygen when pregnant with twins, and it is not necessary to take oxygen at a specific time. Twins pregnant women should go to the hospital for regular checkups during pregnancy, if the development indicators of the fetus is normal, and they do not have any other symptoms of discomfort, generally do not need oxygen, but it is recommended to go to the hospital regularly to monitor the growth and development of the fetus, if the pregnant woman herself has symptoms of wheezing or respiratory distress, it is recommended to go to the hospital in a timely manner for oxygen therapy. Twins need to pay attention to strengthen the nutrition during pregnancy, if the body appears to be weak, anemia or malnutrition, may affect the development of the fetus, and even lead to premature birth phenomenon, should be regular checkups. Women pregnant with twins for the pregnant woman’s body burden is relatively large, usually pay attention to do a good job of obstetrics, once there is an abnormality to pay attention to, timely conditioning and treatment.