Can I go to work if the lower edge of the placenta covers the internal cervical os?

Nov 14, 2025 Source: Cainiu Health

Dr. Zhang Lu

Introduction

If the gestational age is before 28 weeks, the placental position may move upward as the uterus enlarges. In the absence of vaginal bleeding, abdominal pain, or other discomforts, and provided that the job mainly involves sitting or light physical activity without prolonged standing or heavy lifting, and the commute is smooth with opportunities to rest whenever needed, continuing to work generally does not increase risks. Regular follow-up ultrasounds to monitor placental position are recommended.

In general, if the lower edge of the placenta covers the internal cervical os before 28 weeks of gestation, there is no vaginal bleeding, and the work involves light duties, it may be acceptable to continue working. However, if the gestational age is beyond 28 weeks, or if there is vaginal bleeding or physically demanding work, working is not recommended. If in doubt, it is advisable to consult a healthcare provider early. Detailed explanations are as follows:

If the gestational age is before 28 weeks, the placental position may move upward as the uterus expands. In the absence of vaginal bleeding, abdominal pain, or other discomfort, and if the job mainly involves sitting or light physical activity—without prolonged standing or lifting heavy objects—and the commute is smooth with opportunities for rest, continuing to work generally does not increase risks. Regular ultrasound monitoring of placental position is sufficient.

If the gestational age exceeds 28 weeks (diagnosed as placenta previa), or even before 28 weeks but with symptoms such as vaginal bleeding or recurrent abdominal pain, or if the job requires prolonged standing, walking, night shifts, or lifting heavy objects, continuing to work may increase intra-abdominal pressure or lead to fatigue, which could trigger severe bleeding and endanger both maternal and fetal safety. In such cases, work is not advised; bed rest at home with close monitoring of physical condition is recommended.

Pregnant women with a placental edge covering the internal cervical os should undergo regular ultrasound monitoring of placental position. If bleeding or abdominal pain occurs while at work, they should stop working immediately and seek medical attention.

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Is low-lying placenta a common phenomenon?

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.

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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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What should I do if the placenta is close to the internal cervical os?

When the placenta is close to the internal cervical os, measures such as regular prenatal checkups, reduced physical activity, avoiding uterine stimulation, preventing bleeding and infection, and adjusting the delivery plan should be taken. In most cases, the condition gradually improves as gestational age increases, so excessive anxiety is unnecessary. If symptoms such as painless vaginal bleeding or abdominal pain occur, prompt medical attention is recommended. Ultrasound examinations should be performed every 4 weeks during the second trimester and every 2 weeks during the third trimester.

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Is it normal for the placenta to be 3 cm from the cervical opening?

If the gestational age is less than 28 weeks at the time of examination, the lower uterine segment has not fully formed and the placenta may appear relatively low, with a distance of 3 cm from the internal cervical os, which is a common presentation of placenta previa. As gestational age increases, the uterine body gradually enlarges and pulls upward, causing the placenta to typically migrate upwards as well. By 28 weeks of gestation or later, the placenta may return to a normal position. In such cases, there is no need for excessive concern; regular follow-up examinations are sufficient.