What are the causes of fetal arrest in the second trimester?

Nov 08, 2024 Source: Cainiu Health

Dr. Zhang Lu

Introduction

The second trimester refers to the middle stage of pregnancy. Fetal arrest generally indicates cessation of fetal development. Causes of fetal arrest during the second trimester include adverse environmental factors, malnutrition, chromosomal abnormalities, endocrine disorders, infections, and more. If a pregnant woman is frequently exposed to harmful environmental factors such as radiation, toxins, and chemicals during the second trimester, it may affect fetal development and lead to fetal arrest.

Mid-pregnancy refers to the middle stage of pregnancy. Fetal arrest generally means the cessation of fetal development. Causes of fetal arrest during mid-pregnancy include adverse environmental factors, malnutrition, chromosomal abnormalities, endocrine disorders, infections, and others. The analysis is as follows:

1. Adverse environmental factors: If a pregnant woman is frequently exposed to radiation, toxins, or chemicals during mid-pregnancy, these adverse environmental factors may affect fetal development and lead to fetal arrest. Pregnant women are advised to avoid staying in such environments for prolonged periods and to stay away from radiation sources.

2. Malnutrition: Malnutrition during mid-pregnancy, particularly when anemia develops, can not only affect the mother's health but also hinder the normal growth and development of the fetus, potentially leading to fetal arrest in severe cases. Pregnant women need to promptly replenish nutrients and consume adequate protein and vitamin-rich foods.

3. Chromosomal abnormalities: Chromosomal abnormalities are related to genetic factors, sperm quality, and egg quality. They are common causes of fetal arrest during mid-pregnancy. Common chromosomal abnormalities include trisomy syndrome, tetrasomy syndrome, and others, which may lead to abnormal or unsustainable fetal development, resulting in fetal arrest. Women should undergo timely medical examinations before pregnancy to detect any abnormalities early.

4. Endocrine disorders: When endocrine function is abnormal, the hormonal balance required for embryonic development may be disrupted, increasing the risk of fetal arrest. If necessary, medications such as progesterone soft capsules, dydrogesterone tablets, or medroxyprogesterone acetate tablets may be used under medical guidance to alleviate symptoms.

5. Infections: During mid-pregnancy, if a pregnant woman contracts infections caused by bacteria, viruses, mycoplasma, or other pathogens, these pathogens may enter the placenta through the bloodstream, causing placental infection that affects fetal growth and development, potentially resulting in fetal arrest. If the infection is severe, timely induction of labor may be required.

During mid-pregnancy, it is important to maintain healthy lifestyle and dietary habits and avoid exposure to adverse environmental factors in order to reduce the risk of fetal arrest.

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What are the obvious symptoms of a stopped fetal development?

In general, if the fetus stops developing, there may be obvious symptoms such as reduced early pregnancy reactions, light vaginal bleeding, abdominal pain, disappearance of fetal movement, and the uterus no longer enlarging. If you experience any discomfort, it is recommended to seek medical attention promptly. These symptoms suggest that the embryo's development may be abnormal. Once pregnant women notice these signs, they must go to the hospital for examination as soon as possible to allow timely intervention.

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What causes bleeding due to contractions during the second trimester of pregnancy, and what should be done?

In general, bleeding caused by uterine contractions during the second trimester of pregnancy is often due to conditions such as placenta previa, placental abruption, cervical insufficiency, cervicitis, or cervical polyps. Treatment may involve bed rest and medications such as amoxicillin capsules, ritodrine hydrochloride tablets, azithromycin tablets, and cefuroxime axetil capsules. If symptoms of physical discomfort occur, prompt medical attention is recommended.

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Is an HCG level of 80,000 U/L unlikely to result in fetal arrest?

Under normal circumstances, HCG, which stands for human chorionic gonadotropin, reaching a level of 80,000 U/L does not completely rule out the risk of fetal arrest. A comprehensive assessment combining gestational age, dynamic changes, and ultrasound examination is required. Therefore, the level of human chorionic gonadotropin is one of the important indicators for evaluating embryonic development, but it should not be used alone as the definitive basis for determining fetal arrest.

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Can low progesterone levels cause fetal arrest?

In general, low progesterone levels may increase the risk of fetal arrest. Progesterone is an important hormone for maintaining pregnancy, primarily supporting endometrial development and inhibiting uterine contractions to ensure stable embryo implantation. If progesterone levels drop significantly during early pregnancy, it may indicate inadequate luteal function or abnormal embryonic development, thereby increasing the risk of fetal arrest and miscarriage.