In general, a low-lying placenta often causes bleeding after the sixth month of pregnancy. However, in some cases, doctors can detect this condition as early as the first trimester. During the early stages, bleeding may be light, painless, and usually resolves on its own. As the pregnancy progresses, bleeding may recur and become heavier.
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Causes of a Low-Lying Placenta
A low-lying placenta (placenta previa) may result from several contributing factors, including:
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Maternal Age: Women over the age of 35 have a higher risk of developing a low-lying placenta.
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Previous Multiple Pregnancies: A history of multiple pregnancies, such as twins or triplets, may lead to a larger placenta that implants lower in the uterus.
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Impaired Uterine Blood Flow: Reduced blood circulation to the uterine wall—potentially caused by uterine fibroids or underlying conditions such as diabetes—can interfere with normal placental implantation.
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Medications and Lifestyle Factors: Certain antihypertensive medications and heavy smoking (more than 20 cigarettes per day) are associated with an increased risk.
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Uterine Wall Damage: Scarring or injury to the uterine lining from previous cesarean sections, uterine surgeries, or miscarriages may contribute to abnormal placental placement.
Effects on the Mother
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Vaginal Bleeding: One of the most serious complications is significant vaginal bleeding, particularly during the third trimester, which may lead to severe blood loss and shock.
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Premature Rupture of Membranes: A low-lying placenta increases the risk of early rupture of the amniotic sac, potentially triggering preterm labor.
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Postpartum Infection: The risk of infection after delivery is higher due to exposed or torn blood vessels near the cervix, which are more susceptible to infection during and after childbirth.
Effects on the Fetus
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Preterm Birth: Infants may be born prematurely, increasing the risk of neonatal complications and, in severe cases, mortality.
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Low Birth Weight: Reduced placental blood flow and limited nutrient delivery may result in low birth weight and restricted fetal growth.
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Developmental Complications: Newborns may face developmental delays or health conditions, including central nervous system disorders, congenital heart defects, and respiratory or digestive complications.
The Importance of Antenatal Care
Early and consistent antenatal care plays a crucial role in reducing the risks associated with a low-lying placenta. Many complications can be prevented or managed effectively through early diagnosis and close medical monitoring throughout pregnancy.
Treatment strategies may include medication, lifestyle adjustments, and clear guidance on physical activity restrictions to support a safe pregnancy.
If a pregnant woman experiences unusual symptoms—such as vaginal bleeding, pelvic discomfort, or abdominal pain—or even if she simply wishes to confirm a pregnancy, seeking prompt medical attention is strongly advised.
Women’s Center at Phyathai Sriracha Hospital
At the Women’s Center at Phyathai Sriracha Hospital, we provide comprehensive, high-quality care for women at every stage of life. Our experienced team of obstetricians and gynecologists—available daily from 7:30 AM—offers advanced diagnostic services, personalized treatment plans, and the option to consult with female physicians to enhance comfort and ease of communication.










