What happens if the fetus is deprived of oxygen?

During pregnancy, everyone hopes that the fetus can develop healthily until birth. However, pregnancy lasts for ten months. During this long process, various problems may easily occur in the development of the fetus. One of the most common and dangerous manifestations is fetal hypoxia. In addition to factors related to the fetus itself, the mother's body can also cause this phenomenon. So, how will a pregnant woman react if the fetus is deprived of oxygen?

How will pregnant women react to fetal hypoxia?

Symptoms of fetal hypoxia in pregnant women: feeling that the fetus is "losing its temper" and abnormal fetal movements. Fetal hypoxia is called fetal distress, which is not easy for pregnant women to detect themselves, but abnormalities can sometimes be discovered by counting fetal movements. Emotional signs of fetal hypoxia: “Tantrum”. The general manifestations are: initial symptoms are frequent fetal movements, which then weaken and decrease in frequency, and then disappear. Decreased fetal movement is an important indicator of fetal distress. Daily monitoring of fetal movement can predict the safety of the fetus. Detection method: When near full term, the fetal movement is >10 times every 12 hours. The calculation method is that the pregnant woman detects the number of fetal movements for 1 hour each in the morning, noon and evening. The sum of the 3 fetal movements is multiplied by 4, which is the number of fetal movements in 12 hours.

The fetus will also send out distress signals in the early stages of hypoxia, and their manifestation is "throwing temper", which should attract the attention of pregnant women.

Method for calculating fetal movement: Count for one hour at fixed time in the morning, noon and evening every day. If it is more than three times per hour, it reflects that the fetus is in good condition. You can also multiply the sum of the number of fetal movements in the morning, afternoon, and evening by 4, which is the number of fetal movements in 12 hours. If the fetal movement reaches more than 30 times in 12 hours, it reflects that the fetus is in good condition. If it is less than 20 times, it means that the fetus is abnormal. If the fetal movement is less than 10 times, it indicates fetal intrauterine hypoxia.

When counting fetal movements, you should lie down or sit up and concentrate. You can use some small objects (such as coins or buttons, etc.) to mark or record them on paper to avoid missing them. If the fetal movement is continuous or multiple fetal movements are felt at the same time, it can only be counted as one. You have to wait until the fetal movement stops completely before continuing counting. If the fetus continues to move for a long time, you should also be alert. The strength and frequency of fetal movements vary greatly from person to person, with some experiencing more than 100 movements in 12 hours. After counting for a period of time, a pregnant woman will come up with a constant, which she can use as a standard to self-monitor the safety of the fetus.

The second symptom of fetal hypoxia in pregnant women: they stop "gaining weight" and growth stops. After hypoxia, the growth of the fetus will also be slow. The pregnant woman's weight, uterine height, and abdominal circumference continue to remain unchanged or grow very slowly. Due to the pregnant woman's own ischemia and hypoxia, the fetus will suffer from ischemia and hypoxia, which will affect the fetal development. Therefore, pregnant women themselves do not have any obvious subjective feelings. The growth of the fetus can be determined by measuring the height of the uterine fundus (the distance from the top of the pubic symphysis to the highest point of the uterine fundus). Under normal circumstances, the diameter of the breasts should increase by about 1 cm per week after the 28th week of pregnancy. Pregnant women can measure their blood pressure regularly at home or in the hospital. If there is no growth for 2 weeks, further investigation should be done.

Pregnant women weight standard

1. Standard weight before pregnancy (kg) = (height) 2×21 (ideal value is 22), that is, if the height is 160cm, the basic standard weight before pregnancy is 1.6×1.6×21=53.76kg.

2. The difference between actual weight and standard weight before pregnancy is obesity degree = (actual weight - standard weight) / standard weight × 100%. If the obesity degree exceeds 20%, you should pay attention to controlling your weight.

3. The BMI value for measuring obesity = weight (KG) / (height M)2. A BMI value <20 is thin, 20-24 is normal, 24-26.4 is slightly fat, and above 26.4 is too fat.

4. Ideal weight for safe delivery during childbirth (BMI before pregnancy × 0.88 + 6.65) × (height in m)2. For example, if a woman is 155cm tall and weighs 50kg before pregnancy, her ideal weight is 59.97kg, 60kg is 68.76kg, and 70kg is 77kg. Then 7 to 10kg is the appropriate range of weight gain during pregnancy.

The third symptom of fetal hypoxia in pregnant women: the fetal heart rate becomes "interesting". Whether the fetal heart rate is normal or not can also indicate whether the fetus is suffering from fetal hypoxia. Generally speaking, the normal fetal heart rate is regular, ranging from 120 beats/minute to 160 beats/minute. When the pregnant mother is 16-20 weeks pregnant, the average fetal heart rate is 160 beats/minute; when the pregnant mother is 21-30 weeks pregnant, the average fetal heart rate is 147 beats/minute; when the pregnant mother is 31-40 weeks pregnant, the average fetal heart rate is 139 beats/minute. The fetal heart rate is higher when the fetus is moving than when it is at rest. If the mother is too excited, nervous, or anxious, the fetal heart rate can easily increase.

Note: Abnormal fetal heart rate. If the fetal heart rate is too frequent, that is, higher than 160 beats/minute, or too slow, that is, lower than 120 beats/minute, there is a possibility of fetal hypoxia. Tachycardia of 160 to 180 beats/min is the initial signal of fetal distress. This stage lasts a very short time. As hypoxia worsens, the fetal heart rate gradually slows down to 119 to 100 beats/min, followed by arrhythmia, and bradycardia becomes more significant. The fetal heart rate is ≤99 beats/min, and the heart sounds are sometimes strong and sometimes weak. Finally, the heart rate becomes slower and slower, the arrhythmia becomes more serious, and the heart sounds become gradually low and weak. The fetus is in a state of dying, and eventually the heart stops beating and the fetus dies in utero.

Therefore, there must be changes in the fetal heart rate, which needs to be taken seriously by the parents. They should go to the hospital to monitor the fetal heart rate and further check whether the fetus is suffering from hypoxia. Normally, if the fetal position is normal, on the left or right side of the pregnant woman's lower abdomen, where the fetal back is located, the husband can use simple instruments to listen.