Symptoms
Common signs and symptoms of Placenta Accreta Spectrum include:
When to see a doctor
If you experience severe or worsening symptoms, seek immediate medical attention. Always consult with a healthcare professional for proper diagnosis and treatment.
Causes & Risk Factors
Several factors can contribute to Placenta Accreta Spectrum.
Placenta accreta spectrum develops when the placenta attaches too deeply to the uterine wall during pregnancy.
Placenta accreta spectrum develops when the placenta attaches too deeply to the uterine wall during pregnancy. Think of it like a plant whose roots grow too aggressively into soil that's been disturbed. In a normal pregnancy, the placenta attaches to the endometrium, the inner lining of the uterus. A thin layer called the decidua acts like a natural barrier, allowing the placenta to connect with the mother's blood supply while maintaining clear boundaries.
When this natural barrier is damaged or absent, the placenta's blood vessels can grow directly into the uterine muscle.
When this natural barrier is damaged or absent, the placenta's blood vessels can grow directly into the uterine muscle. This typically happens in areas where the uterine wall has been weakened by previous surgery, most commonly cesarean sections. Scar tissue from previous procedures creates weak spots where the normal decidual layer may be thin or missing entirely. The placenta, seeking the best blood supply for the growing baby, naturally gravitates toward these areas.
The severity of the condition depends on how deeply the placental tissue penetrates.
The severity of the condition depends on how deeply the placental tissue penetrates. In placenta accreta, the attachment goes beyond the normal boundary but stays within the decidua. Placenta increta involves deeper penetration into the uterine muscle itself. The most severe form, placenta percreta, occurs when the placenta grows completely through the uterine wall and may attach to nearby organs like the bladder, bowel, or abdominal wall.
Risk Factors
- Previous cesarean section delivery
- Placenta previa in current pregnancy
- Multiple previous uterine surgeries
- Advanced maternal age over 35
- Previous uterine curettage or D&C procedures
- History of Asherman's syndrome
- Previous myomectomy or fibroid removal
- Multiple previous pregnancies
- Previous endometrial ablation
- Smoking during pregnancy
Diagnosis
How healthcare professionals diagnose Placenta Accreta Spectrum:
- 1
Diagnosing placenta accreta spectrum typically begins during routine prenatal care, often through ultrasound examinations performed in the second or third trimester.
Diagnosing placenta accreta spectrum typically begins during routine prenatal care, often through ultrasound examinations performed in the second or third trimester. Your doctor may suspect the condition if you have risk factors like previous cesarean sections combined with placenta previa. The ultrasound technician looks for specific signs including loss of the normal clear space between the placenta and uterine wall, unusual blood vessel patterns, and areas where the placenta appears to bulge beyond the normal uterine contour.
- 2
When ultrasound suggests placenta accreta spectrum, your doctor will likely order magnetic resonance imaging (MRI) for a more detailed view.
When ultrasound suggests placenta accreta spectrum, your doctor will likely order magnetic resonance imaging (MRI) for a more detailed view. MRI provides clearer images of how deeply the placenta has penetrated and whether it has reached nearby organs. This information proves crucial for delivery planning. The radiologist examines the images for telltale signs like dark bands indicating abnormal placental attachment, bulging of the uterine wall, and loss of normal tissue planes between organs.
- 3
Sometimes the condition isn't detected until delivery, when the placenta fails to separate naturally from the uterus after the baby is born.
Sometimes the condition isn't detected until delivery, when the placenta fails to separate naturally from the uterus after the baby is born. In these cases, doctors may attempt manual removal, but this can cause dangerous bleeding. Blood tests during and after delivery help monitor for signs of hemorrhage and shock. The definitive diagnosis often comes through pathological examination of the placenta and any removed uterine tissue, which shows the characteristic deep invasion of placental blood vessels into uterine muscle.
Complications
- The most serious immediate complication of placenta accreta spectrum is severe, life-threatening hemorrhage during delivery.
- This bleeding can be massive and rapid, potentially leading to shock, organ failure, and death if not promptly controlled.
- Emergency hysterectomy becomes necessary in many cases to save the mother's life, permanently ending her ability to bear children.
- Even with expert management, some women require dozens of units of blood products and face risks associated with massive transfusion.
- Long-term complications can include chronic pain, infection, and in rare cases when conservative management is attempted, the need for delayed hysterectomy weeks or months later.
- Some women develop adhesions or scar tissue that can cause bowel obstructions or chronic pelvic pain.
- When the placenta invades nearby organs like the bladder, surgical repair may result in temporary or permanent changes in urinary function.
- Despite these serious risks, most women who receive appropriate care at specialized centers recover fully, though the emotional impact of emergency surgery and potential loss of fertility can require ongoing support.
Prevention
- Maintaining optimal spacing between pregnancies (at least 18-24 months)
- Managing chronic conditions like diabetes and high blood pressure before conception
- Avoiding smoking, which can impair placental function and increase complications
- Discussing family planning with your doctor if you've had multiple cesarean sections
Treatment for placenta accreta spectrum requires careful planning and a specialized medical team, ideally assembled well before delivery.
Treatment for placenta accreta spectrum requires careful planning and a specialized medical team, ideally assembled well before delivery. When the condition is diagnosed during pregnancy, doctors typically plan a scheduled cesarean section combined with hysterectomy, performed by maternal-fetal medicine specialists, gynecologic surgeons, and anesthesiologists experienced in managing massive blood loss. This approach, while major surgery, often provides the safest outcome for both mother and baby.
The surgical team prepares extensively for potential complications.
The surgical team prepares extensively for potential complications. They may place special balloons in the mother's blood vessels beforehand to quickly control bleeding if needed. Large-bore IV lines ensure rapid blood and fluid replacement, while blood products including red blood cells, plasma, and platelets are kept readily available. Some centers use interventional radiology techniques to temporarily block blood flow to the uterus during surgery, reducing the risk of life-threatening hemorrhage.
In select cases where preserving fertility is extremely important and the invasion appears limited, some specialists attempt conservative management.
In select cases where preserving fertility is extremely important and the invasion appears limited, some specialists attempt conservative management. This might involve leaving the placenta in place and allowing it to be naturally absorbed over time, combined with medications to prevent infection and control bleeding. However, this approach carries significant risks including infection, bleeding, and the need for emergency surgery later. Most women require close monitoring for months afterward.
Blood transfusion often becomes necessary during treatment, sometimes requiring multiple units of blood products.
Blood transfusion often becomes necessary during treatment, sometimes requiring multiple units of blood products. Modern blood banking and transfusion medicine have made these procedures much safer than in the past. Recovery typically involves several days in the hospital, with careful monitoring for bleeding, infection, and other complications. Physical therapy and gradual return to normal activities help speed recovery, though complete healing may take several months.
Living With Placenta Accreta Spectrum
Living with a diagnosis of placenta accreta spectrum during pregnancy requires significant emotional and practical preparation. Many women benefit from connecting with support groups or counselors who understand the unique challenges of high-risk pregnancy. Creating a detailed birth plan with your medical team, including preferences for various scenarios, can help you feel more in control. Consider practical preparations like:
Latest Medical Developments
Latest medical developments are being researched.
Frequently Asked Questions
Update History
Mar 16, 2026v1.0.0
- Published by DiseaseDirectory