What are the causes of unexpected miscarriage?

Pregnancy is a period of both danger and happiness for women, because pregnancy is not so safe. Many women suffer from symptoms of accidental termination of pregnancy due to various reasons. These are typical symptoms of miscarriage, which have a great impact on people's bodies and hit women's mental health. What are the causes of accidental miscarriage? Let's take a look at the explanation below.

Unexpected miscarriage generally refers to a natural termination of pregnancy that occurs before 28 weeks and when the fetus weighs less than 1,000 grams. If classified by time: early miscarriage, before 12 weeks of pregnancy, and late miscarriage, from 12 weeks to less than 28 weeks of pregnancy.

1. Incomplete embryonic development: Abnormal fertilized eggs are the main cause of early miscarriage. About 80% of miscarriages in the first two months of pregnancy are due to some defects in sperm and eggs, which causes the embryo to develop to a certain extent and then terminate. Therefore, the original embryonic tissue cannot be seen in the discharge of this type of miscarriage.

2. Endocrine dysfunction: The fertilized egg can only implant on the uterine wall and grow and develop into a fetus under the action of progesterone. When the body does not secrete enough progesterone, the uterine decidua will develop poorly, thus affecting the development of the fertilized egg and easily causing miscarriage. If the amount of prostaglandins increases, it will cause frequent contractions of the uterine muscles and may also lead to miscarriage. Reduced thyroid function can cause cell oxidation disorders, thereby affecting the growth and development of the embryo and causing miscarriage.

3. Reproductive organ diseases: uterine malformations such as bicornuate uterus, septate uterus, and uterine hypoplasia. Pelvic tumors, especially submucosal fibroids, can affect the growth and development of the fetus and cause miscarriage. Relaxation of the internal os of the uterus or deep laceration of the cervix can cause premature rupture of membranes and late miscarriage.

4. Systemic diseases of pregnant women: Pregnant women suffer from acute infectious diseases such as influenza, typhoid fever, pneumonia, etc. Bacterial toxins or viruses enter the fetus through the placenta, causing fetal poisoning and death. High fever can promote uterine contractions and cause miscarriage. Pregnant women suffering from chronic diseases such as severe anemia, heart failure, chronic nephritis and hypertension may suffer fetal disability and miscarriage due to placental infarction and intrauterine hypoxia. Malnutrition of pregnant women, especially vitamin deficiency, as well as mercury, lead and alcohol poisoning can cause miscarriage.

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