Risk factors

Many factors can increase the risk of placenta accreta, including:

• Previous uterine surgery. The risk of placenta accreta increases with the number of C-sections or other uterine surgeries you've had.
• Placenta position. If the placenta partially or totally covers your cervix (placenta previa) or sits in the lower portion of your uterus, you're at increased risk of placenta accreta.
• Maternal age. Placenta accreta is more common in women older than 35.
• Previous childbirth. The risk of placenta accreta increases as your number of pregnancies increases.