Effective contraceptive measures can prevent placenta previa.

Mar 05, 2025 Source: Cainiu Health

Dr. Zhang Lu

Introduction

In general, effective contraceptive measures can help prevent placenta previa to some extent. Effective contraception reduces the number of unintended pregnancies, thereby decreasing the risk of endometrial damage and indirectly lowering the risk of placenta previa. In addition, appropriate intervals between pregnancies allow the uterus to fully recover and reduce the likelihood of abnormal endometrium, which may also lower the incidence of placenta previa.

Generally speaking, effective contraceptive measures can partially prevent placenta previa, but cannot completely prevent it. The detailed analysis is as follows:

Placenta previa is a pregnancy complication characterized by the placenta being located in the lower segment of the uterus, sometimes even covering the cervix, which may cause bleeding during pregnancy and risks during delivery. Effective contraception can indirectly reduce the risk of placenta previa by decreasing the number of unnecessary pregnancies and thus reducing the chance of endometrial damage. Additionally, appropriate intervals between pregnancies help the uterus fully recover and reduce the likelihood of abnormal endometrium, thereby potentially lowering the incidence of placenta previa.

However, the development of placenta previa may also be related to placental abnormalities such as an overly large placenta or abnormal morphology, as well as delayed development of the fertilized egg's trophoblast. Even with effective contraceptive measures in place, placenta previa cannot be completely prevented.

It is recommended to maintain safety during pregnancy, avoid abdominal trauma, and prevent accidents such as falls. At the same time, follow medical advice for regular prenatal checkups to monitor the position and development of the placenta promptly.

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What to do if you accidentally get pregnant

In general, an unintended pregnancy refers to an accidental pregnancy. Accidental pregnancy can be managed by maintaining emotional stability, seeking support, consulting with a healthcare professional, engaging in appropriate physical activity, and maintaining healthy lifestyle habits. When facing an unintended pregnancy, it is important to enhance sex education and knowledge about contraception, and to take effective contraceptive measures to prevent unintended pregnancies.

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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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Is it necessary to perform external cephalic version for abnormal fetal position?

If a pregnant woman is around 36–37 weeks gestation, has no complications such as pregnancy-induced hypertension or placenta previa, and the fetus shows no issues like nuchal cord or abnormal fetal heart rate, and if the woman expresses a preference for vaginal delivery, performing external cephalic version (ECV) is advisable. Successful repositioning increases the likelihood of vaginal delivery and reduces problems associated with postoperative recovery from cesarean section, thereby better meeting the health needs of both mother and baby.

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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.