What are the reasons for miscarriage in the third month of pregnancy?

For pregnant friends who have experienced miscarriage at three months of pregnancy, this news is undoubtedly a bolt from the blue. So why does the fetus stop growing in three months of pregnancy? What are the reasons for miscarriage during the third month of pregnancy? Next, this article will introduce to you the reasons for fetal arrest in three months of pregnancy, for your reference only. Friends who want to know the reasons for fetal arrest in the third month of pregnancy can take a look.

What are the reasons for miscarriage during the third month of pregnancy? The reasons for miscarriage in the third trimester of pregnancy are as follows:

1. Endocrine disorders

Embryo implantation and continued development depend on the coordination of a complex endocrine system. Any abnormality in any link can lead to miscarriage. The most common of these is luteal dysfunction. Luteal insufficiency can cause delayed endometrial development and a short luteal phase, thereby affecting the implantation of the fertilized egg or early pregnancy miscarriage.

2. Uterine abnormalities

About 10% to 15% of miscarriages are caused by uterine defects.

3. Chromosomal abnormalities

Multiple chromosomal abnormalities can lead to embryo failure and cause early miscarriage. Chromosome abnormalities include quantitative and structural abnormalities. Quantitative abnormalities can be divided into aneuploidy and polyploidy. The most common abnormal karyotype is triploidy, and trisomy 16 accounts for 1/3 and is often lethal. 25-67% of pregnancies with trisomy 21, 4-50% of pregnancies with trisomy 13, and 6-33% of pregnancies with trisomy 18 will result in miscarriage.

4. Immune factors

The embryo or fetus in the uterus is actually an allogeneic transplant because the fetus is a combination of the genetic material of the parents and cannot be exactly the same as the mother. Immune incompatibility between mother and fetus causes the mother to reject the fetus.

3. Reproductive tract infection

In addition to the above factors, early pregnancy miscarriage caused by infection has received increasing attention from scholars at home and abroad. Severe TORCH infection in early pregnancy can cause fetal death or miscarriage, and milder infection can also cause fetal malformations.

6. Environmental factors

Changes in physiological state during pregnancy cause significant changes in the mother's absorption, distribution and excretion of therapeutic drugs and various environmental hazards. In the early stages of development, the embryo is extremely sensitive to the effects of therapeutic drugs and environmental factors. At this time, various harmful factors can cause damage to the embryo or even loss.

Among the people with embryonic arrest, a considerable number are white-collar workers, especially older white-collar workers. Modern women are under great pressure, which causes mental tension and endocrine disorders, and are prone to problems such as luteal insufficiency that are not conducive to early embryo implantation and development. Experts suggest that you must adjust your mindset before and after pregnancy and must not overwork yourself.

The above is an introduction to the reasons for fetal arrest in the third month of pregnancy. I believe that after reading the above introduction, you already know the reasons for fetal arrest in three months of pregnancy. From the above introduction, we can see that there are many reasons that cause fetal arrest in the third month of pregnancy. As for what the cause is, it needs to be determined through a doctor's examination and questioning.