Breathing is the instinct of all creatures. From birth, we can breathe freely without learning. Oxygen is the basis of all living things. Without oxygen, people will suffocate in an instant and can’t survive at all. < / P > < p > after a pregnant mother is pregnant, how does the fetus breathe in the mother’s womb? Does the fetus need oxygen? The answer is yes, the growth and development of the fetus comes from the maternal nutrition supply, even oxygen from the maternal blood. < / P > < p > the oxygen that the pregnant mother breathes flows from the trachea to the bubbles in the lungs. Oxygen enters the blood vessels from the bubbles in the lungs. When the blood in the blood vessels flows through the placenta, the hemoglobin in the blood vessels releases oxygen. < / P > < p > the fetal hemoglobin captures the oxygen released by the mother and completes the breathing. This process requires the perfect relay between mother and son, and the placenta of the fetus provides an important place for the oxygen relay of the fetus. < / P > < p > if the pregnant mother has blood circulation disorder, resulting in insufficient oxygen content in the blood, then the fetus can not absorb enough oxygen from the mother, which is easy to lead to fetal hypoxia. < / P > < p > if there is a problem with the placenta as a transit station, and the oxygen in the mother’s body cannot be transported and exchanged through the placenta, the connection between the fetus and the mother will be in trouble. < / P > < p > the mischievous fetus in the pregnant mother’s belly is very excited. She entangles herself with the umbilical cord, and the baby can’t open it for a moment after being entangled. The excessive number of umbilical cord winding coils inhibits breathing. < / P > < p > from the 28th week of gestation, the fetus is in the fastest growing period, at this time, the fetal oxygen demand is the largest, and the larger size of the fetus also makes the space smaller and smaller, and the fetus is easy to be entangled by the umbilical cord. < / P > < p > after 32 weeks of pregnancy, things will turn around. Once the fetus is detected to have hypoxia, you can seek the help of doctors to solve the problem by oxygen inhalation. < / P > < p > because of the heavy physical burden of mothers in the third trimester of pregnancy, many pregnant mothers choose comfortable nests to rest at home. The space in the home is closed, the air quality is not good, and the quality of oxygen delivered by pregnant mothers to the fetus is also poor. < p > < p > suggestion: pregnant mothers can choose to take a walk in a small park nearby on sunny days from 10:00 to 2:00 p.m., and the best time for each walk is half an hour. < / P > < p > you can’t choose your sleeping position at night. Your mother’s stomach is very big. If you lie on your back or sleep on your right, it will not be good for the development of the fetus and affect the mother’s blood circulation. < / P > < p > suggestion: in the left lying position, the pregnant mother can take this sleeping position to help the placenta maintain good blood circulation, and the fetus can breathe more oxygen from the blood. < / P > < p > the most important role of fetal heart rate monitoring is to detect fetal hypoxia. Pregnant mothers can not cancel the prenatal examination without permission. The consequences of fetal hypoxia may be very serious, and pregnant mothers will regret it. < / P > < p > suggestion: the fetal heart rate monitoring needs to be done by the pregnant mother every week, and the pregnant mother should not refuse to do it if she is in good condition. The function of fetal heart rate monitoring is to confirm whether the fetus is lack of oxygen, and the pregnant mother can not delay it on her own. < / P > < p > from the fetal length to 34-36 weeks, the items of prenatal examination will increase fetal heart rate monitoring, each time about 20-30 minutes, the time is very short, as long as the mother goes to the hospital on time for regular birth examination, she can rest assured. < / P > < p > the pregnant mother can feel the fetus swimming like a fish in 16-20 weeks, and it is easier for the mother to feel the fetal movement after 28 weeks. The baby’s small hands and feet may lift the mother’s belly. < p > < p > < p > counting fetal movements: add the values of fetal movements in the morning, middle and late every day and multiply the sum by 4. The time of one fetal movement is one hour, which represents the average fetal movement of 12 hours. If the value is more than 30, it means the fetus is normal; if the number is less than 20 times, it means continuous observation; if it is less than 10 times, it means that the fetus may be hypoxia. < / P > < p > if the pregnant mother has found that the baby has umbilical cord around the neck during the prenatal examination, then the mother should try to avoid excessive exercise during daily exercise. < / P > < p > the vital signs of the fetus can be monitored by the mother himself every day. In daily life, the mother can carefully experience it. Once the baby is found to have abnormal conditions, she should immediately seek medical advice and seek the help of a doctor.