When do pregnant women need oxygen in late pregnancy?

Pregnant women in late pregnancy need to inhale oxygen when they have dyspnea and when there are indications of intrauterine hypoxia in the fetus.
1. Conscious dyspnea: When a pregnant woman in late pregnancy feels that she is struggling to breathe, has difficulty in breathing, or has open mouth or sitting breathing, she needs to inhale oxygen to alleviate her symptoms of dyspnea. When it is found that the pregnant woman has developed cyanosis of the lips, the respiratory rate increases obviously, it is necessary to give oxygen in time.
2. Fetal intrauterine anoxia: when pregnant women in late pregnancy fetal heart rate monitoring found that the number of fetal movements significantly reduced, may suggest that the fetus has intrauterine anoxia phenomenon. At this time, it is necessary to give pregnant women timely oxygen to relieve fetal hypoxia.
If a pregnant woman has difficulty breathing in late pregnancy, it is recommended that she consult a doctor in time.