Being told that you have a low-lying placenta during pregnancy can naturally cause concern. However, when a low-lying placenta is detected early in pregnancy, its position may change as the uterus grows. This is why follow-up ultrasound scans are important before drawing conclusions about how it may affect the rest of the pregnancy or delivery.
In this article, Dr. Archana Belvi, Senior Consultant in Obstetrics and Gynecology at Momstory, Hadapsar, explains what a low-lying placenta means, how its position may change during pregnancy, the precautions that may be advised and when it may be considered placenta previa.
What Is the Placenta and Why Is It Important?
The placenta is an organ that develops during pregnancy and plays an essential role in supporting the growing baby.
It provides oxygen and nutrients to the baby and helps maintain the connection between the mother and the developing fetus throughout pregnancy.
What Is a Low-Lying Placenta?
The placenta usually attaches higher up in the uterus. When the placenta is located in the lower part of the uterus, close to the cervix, it may be described as a low-lying placenta.
Its significance depends on factors such as:
- How close the placenta is to the cervix
- Whether it covers the cervical opening
- The stage of pregnancy
- Whether the mother has experienced vaginal bleeding
- Whether its position changes as pregnancy progresses
A low-lying placenta identified early in pregnancy does not necessarily mean that it will remain low until delivery.
Is a Low-Lying Placenta Common in Early Pregnancy?
A placenta that appears low on an ultrasound during early pregnancy may later be found farther away from the cervix as the uterus expands.
This apparent upward movement is often referred to as placental migration, although the placenta itself does not physically travel through the uterus. Instead, changes in the growing uterus can increase the distance between the placental edge and the cervix.
Therefore, if your early pregnancy scan shows a low-lying placenta, your gynecologist may recommend follow-up ultrasound scans to reassess its position.
Does a Low-Lying Placenta Move Up Naturally?
In many pregnancies, yes.
As pregnancy progresses and the uterus grows, a placenta that was initially close to the cervix may no longer be considered low lying on later ultrasound scans.
No medicine is generally required specifically to make the placenta “move upward.” Instead, your doctor will monitor its position through ultrasound and advise you according to the findings.
If the placenta continues to remain low later in pregnancy, closer monitoring may be necessary.
What Is Placenta Previa?
Placenta previa occurs when the placenta lies over or very close to the opening of the cervix in late pregnancy.
This is different from simply identifying a low-lying placenta on an early pregnancy scan.
The distinction is important because a placenta that remains over the cervical opening can affect how the baby can be safely delivered.
What Are the Risks of a Persistently Low Placenta?
One of the main concerns associated with a low-lying placenta or placenta previa is vaginal bleeding during pregnancy.
The risk and severity depend on the placenta’s exact position and other individual pregnancy factors.
If you have been diagnosed with a low-lying placenta and experience any vaginal bleeding, contact your maternity team or seek medical attention promptly.
Can You Have a Normal Delivery With a Low-Lying Placenta?
Whether vaginal delivery is possible depends primarily on the placenta’s position later in pregnancy.
If follow-up scans show that the placenta has moved sufficiently away from the cervix, vaginal delivery may be possible depending on other obstetric factors.
However, if the placenta continues to cover or remain too close to the cervical opening, your obstetrician may recommend a planned caesarean section for a safer delivery.
The delivery plan is therefore based on late-pregnancy ultrasound findings rather than the position seen on an early scan alone.
What Precautions Should You Take With a Low-Lying Placenta?
The precautions required can vary significantly from one pregnancy to another. According to Dr. Belvi, women diagnosed with a low-lying placenta may be advised to avoid activities that could increase pelvic strain.
Depending on your individual condition, your gynecologist may recommend precautions regarding:
- Long or unnecessary travel
- Sexual intercourse
- Strenuous exercise
- Squats or similar exercises
- Activities that significantly increase pressure in the pelvic region
These restrictions are not necessarily required for every woman with a low-lying placenta, so follow the specific instructions given by your gynecologist rather than restricting normal activities unnecessarily.
Why Are Follow-Up Ultrasound Scans Important?
The position of the placenta early in pregnancy does not always predict where it will be later.
Follow-up ultrasound helps your doctor determine:
- Whether the placenta is still low lying
- Its distance from the cervix
- Whether it is covering the cervical opening
- Whether additional monitoring is required
- Whether vaginal delivery may be possible
- Whether a planned caesarean section may be necessary
Your gynecologist will recommend the appropriate timing of repeat scans based on your pregnancy.
When Should You Contact Your Doctor?
If you have been diagnosed with a low-lying placenta, follow your obstetrician’s recommendations carefully.
More importantly, vaginal bleeding during pregnancy should not be ignored. Seek prompt medical assessment if bleeding occurs, particularly if it is heavy, recurrent or accompanied by pain, contractions, dizziness or weakness.
Does a Low-Lying Placenta Mean You Should Panic?
No. A low-lying placenta detected early in pregnancy does not automatically mean that you will have placenta previa at the time of delivery.
For many women, the relationship between the placenta and cervix changes as the uterus grows. Follow-up ultrasound scans help determine whether the placenta remains low and whether any special precautions or changes to the delivery plan are required.
Conclusion
A low-lying placenta in early pregnancy often requires monitoring rather than immediate treatment. As the uterus grows, the placenta may eventually be located farther away from the cervix.
If it remains low or covers the cervix later in pregnancy, closer monitoring and a planned caesarean delivery may be recommended depending on its exact position.
If you have been diagnosed with a low-lying placenta, follow the advice of your gynecologist, attend your recommended ultrasound scans and seek medical attention promptly if you experience vaginal bleeding.
