Causes of miscarriage in 4 months of pregnancy

In today's society, there are many reasons for miscarriage, such as stress, improper diet, and unhealthy work and rest schedules, which may all lead to miscarriage. The pregnancy process is originally a very difficult time. Miscarriage after pregnancy not only causes harm to the body, but also affects the mind and body, especially when the pregnancy is finally achieved. Let’s discuss the reasons for miscarriage in the fourth month of pregnancy.

Causes of miscarriage in 4 months of pregnancy

1. Chromosomal abnormalities

Chromosomal abnormalities include chromosomal abnormalities such as monosomy, trisomy and polyploidy; structural abnormalities such as rupture, deletion and chromosome translocation may cause miscarriage. Sex chromosome research has been conducted on both spontaneous and treated miscarriage. The nucleus was found in spontaneous abortion. Abnormal species accounted for 60%. Everyone with chromosomal abnormalities has structural abnormalities, such as fetuses or embryos, and normal fetuses with normal karyotypes are even more normal.

2. Endocrine imbalance

Excessive estrogen and luteal copper deficiency are also causes of miscarriage in early pregnancy. Because during the 12-14 weeks of pregnancy, the embryonic development period replaces the corpus luteum deficiency during pregnancy, which can easily cause endocrine imbalance, especially corpus luteum deficiency. In addition, high levels of thyroid hormone can affect the body's cellular oxidation process, as well as hyperthyroidism and diabetes.

3. Incomplete function of embryo and embryonic endocrine

Decidual uterine bleeding in early pregnancy can cause bleeding or hyperplasia of the decidual tissue, fusion of the villus squamous epithelial cells and decidual cells, obstruction of the hcg blood vessels, affecting the absorption and transportation of nutrients, leading to sperm-egg fusion dependence, bleeding and miscarriage. In addition, if the embryo is massively blocked, it may reduce the function of the placenta and affect the survival of the fetus; and placenta previa and fetal villous edema turning into miscarriage are also common.

4. Blood type does not match

Due to previous pregnancy or intravenous injection, the harmful factors produce antibodies in the pregnant mother. This type of pregnancy progresses from the embryo to the fetus and coagulates and hemolyzes with blood cells, causing miscarriage.