Is low-lying placenta a common phenomenon?

Nov 09, 2024 Source: Cainiu Health

Dr. Zhang Lu

Introduction

In general, placenta previa is not a common condition. Under normal circumstances, the placenta usually attaches to the anterior wall, posterior wall, or lateral wall of the uterus, and these locations do not affect placental blood circulation or the normal development of the fetus. Placenta previa refers to a condition in which the placenta attaches to the lower segment of the uterus, with its edge reaching or covering the internal cervical os, which may cause vaginal bleeding during pregnancy, preterm labor, and other complications.

Generally, low-lying placenta is not a common occurrence. The detailed explanation is as follows:

Under normal circumstances, the placenta typically attaches to the anterior wall, posterior wall, or lateral wall of the uterus, and these locations do not interfere with placental blood circulation or the fetus's normal development. A low-lying placenta, however, refers to the placenta attaching to the lower segment of the uterus, with its edge reaching or covering the internal cervical os. This condition may result from factors such as repeated abortions leading to thin endometrium, multiple pregnancies, or uterine fibroids. Such a situation may lead to vaginal bleeding during pregnancy or preterm labor.

Therefore, a low-lying placenta is not common; it usually occurs in pregnant women who have specific underlying medical conditions.

In daily life, a low-lying placenta does not necessarily indicate problems for the mother or fetus, but close monitoring of physical condition under medical supervision is essential. It is advisable to get adequate rest and avoid strenuous activities, which can benefit both the mother and the developing fetus.

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What causes slight bleeding in the third trimester of pregnancy without abdominal pain, and what should be done?

In late pregnancy, slight bleeding without abdominal pain may be caused by factors such as bloody show, cervical polyps, placenta previa, early placental abruption, or vaginitis. Symptoms can be managed through symptom observation, bed rest, medication, and medical monitoring. If bleeding increases or abdominal pain occurs, immediate medical attention is required. In late pregnancy, the cervix matures, and the fetal membranes near the internal cervical os may separate from the uterine wall.

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At what time of day is the HCG level highest?

From the perspective of HCG secretion mechanism, it is continuously secreted by placental trophoblastic cells, and the secretion process is relatively stable, without significant peak variations according to circadian rhythms as seen with certain other hormones. During daytime, when the body is active and metabolism functions normally, HCG levels remain relatively stable, with minimal variation in test results at different times, making it difficult to identify a single peak time.

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Why are there so few people with a posterior placenta?

It is not uncommon for embryos to implant on the posterior wall of the uterus; it is simply slightly less common compared to anterior wall implantation. The main reasons include anatomical features of the uterus, the random nature of embryo implantation, pelvic environmental factors, hormonal regulation, and history of prior uterine procedures. Both posterior and anterior wall implantations are considered normal. If abnormal symptoms such as abdominal pain or vaginal bleeding occur during pregnancy, prompt medical attention is recommended.

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Why does the stomach become hard after slight movement at 27 weeks of pregnancy, and what should be done?

In general, during the 27th week of pregnancy, slight physical activity causing the abdomen to feel hard may be due to false labor contractions (Braxton Hicks contractions), uterine enlargement stretching ligaments, preterm labor signs, placental abruption, or red degeneration of uterine fibroids. Depending on the specific situation, improvements can be achieved through general management, medication, or surgical treatment. Pregnant women should avoid strenuous exercise and walk within their limits. Regular prenatal checkups are essential to monitor uterine and fetal conditions.