Causes of fetal hypoxia in late pregnancy

During pregnancy, many symptoms are unpredictable. Every pregnant woman hopes that her child can grow up healthy and strong. However, some phenomena that occur during pregnancy always make everyone at a loss, such as fetal hypoxia in the late pregnancy. So, first of all, what is this phenomenon?

When a fetus shows signs of hypoxia in the uterus, which endangers the health and life of the fetus, it is called fetal distress. Fetal distress is a complex symptom and is currently one of the main indications for cesarean section. Fetal distress mainly occurs during labor, but can also occur in late pregnancy. Those that occur during labor may be a continuation and aggravation of those that occur in late pregnancy. [Causes>The causes of fetal distress involve many aspects and can be summarized into three categories.

1. Maternal factors: Insufficient oxygen in the mother's blood is an important cause. In case of mild hypoxia, the mother usually has no obvious symptoms, but it will affect the fetus. Maternal factors that lead to fetal hypoxia include: ① Insufficient blood supply to micro-arteries: such as pregnancy-induced hypertension. ② Insufficient oxygen carrying capacity of red blood cells: such as severe anemia, carbon monoxide poisoning, etc. ③Acute blood loss: such as placenta previa, placental abruption, etc. ④Shock and acute infection fever caused by various reasons. ⑤ Obstruction of uterine placental blood supply: premature labor or uncoordinated uterine atony, excessive uterine contractions caused by improper use of oxytocin; prolonged labor, especially the second stage of labor; excessive uterine distension, such as polyhydramnios and multiple pregnancy; premature rupture of membranes, etc.

2. Placenta and umbilical cord factors The umbilical cord and placenta are the channels for transporting oxygen and nutrients between the mother and the fetus. Their dysfunction will inevitably affect the fetus's ability to obtain the required oxygen and nutrients. Common symptoms include obstructed umbilical cord blood flow and placental dysfunction: such as overdue pregnancy, placental development disorders (too small or too large), abnormal placental shape (membranous placenta, contour placenta, etc.) and placental infection, placental abruption, and severe placenta previa. 3. Fetal factors include dysfunction of the fetal cardiovascular system, such as severe congenital cardiovascular disease and intracranial hemorrhage, fetal malformation, maternal-fetal blood type incompatibility, fetal intrauterine infection, etc.

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In the above article, we learned about fetal hypoxia in the late pregnancy. First of all, this phenomenon causes great harm to the child and may even affect the child’s breathing. So if you encounter such a phenomenon in life, friends should deal with it in a timely manner.