Why does pregnancy stop?

Miscarriage of pregnancy, also known as fetal arrest, refers to a phenomenon in which the fetus stops growing and developing in the early stages of pregnancy. Generally speaking, fetal arrest will include disappearance of pregnancy symptoms, vaginal bleeding, abdominal pain, etc. There are many reasons that lead to fetal arrest, such as genetic factors, endocrine disorders, uterine abnormalities, female reproductive tract infections, viral infections, environmental factors, etc. Below, we will introduce the symptoms and causes of fetal arrest in detail.

1. What is embryonic arrest?

The fertilized egg is like a seed. It has to go through a series of responsible and wonderful processes before it will eventually become a healthy baby. If in the initial stage, the fertilized egg is like a poor sprout, then it will most likely stop growing healthily. We call this phenomenon of the embryo stopping development in early pregnancy fetal arrest.

The embryo usually has a fetal bud and heart tube beating at around 40-50 days. If during this period or more than 2 months later, the B-ultrasound examination does not find a fetal bud or fetal heart, or there is a fetal bud but no fetal heart, it should be considered that the fetus has stopped developing.

2. What are the symptoms of embryonic arrest?

After the embryo stops developing, the mother's pregnancy reactions will gradually disappear. Early pregnancy reactions such as nausea and vomiting will no longer occur, and the feeling of breast swelling will also weaken. Then there will be vaginal bleeding, usually dark red bloody leucorrhea, and finally abdominal pain may occur, and the embryo will be expelled from the body.

Of course, it varies from person to person. Some women may not show any signs at all, but may directly experience abdominal pain, followed by miscarriage, or have no symptoms after embryonic arrest. But in general, embryonic arrest can be detected in time through routine B-ultrasound examinations.

3. What causes embryonic arrest?

There are many reasons for fetal growth retardation, the most common ones are as follows:

1. Genetic factors: such as chromosomal abnormalities and genetic gene defects. Common ones include sperm or egg chromosomal abnormalities.

2. Endocrine disorders: Early embryonic development requires three important hormone levels: estrogen, progesterone and human chorionic gonadotropin. However, endocrine disorders in mothers lead to insufficient endogenous hormones, which cannot meet the needs of the embryo, making it difficult to support embryonic development and causing death.

3. Uterine abnormalities: The internal environment of the uterus and the overall environment of the uterus may have an impact on the embryo.

4. Female reproductive tract infection: Severe infection of the female reproductive tract in early pregnancy can cause fetal death or miscarriage, and milder infection can also cause fetal malformation.

5. Viral infection: Viral infection can also cause embryo arrest and miscarriage

6. Environmental factors: During pregnancy, the embryo is extremely sensitive to the effects of therapeutic drugs and environmental factors. At this time, various bad living habits, such as smoking, alcoholism, drugs, special drugs, etc. will affect the early development of the embryo.