Foundations of Placental Complications: Understanding Previa, Accreta, and Abruption

The placenta is not often the focus of prenatal education, yet it is the organ on which the entire pregnancy depends. Complications involving the placenta — its position, its attachment, and the risk of premature separation — are among the most serious pregnancy complications because of their potential to cause significant, rapid bleeding. Understanding what each condition is, how it is detected, and what management involves is important for any person navigating a high-risk pregnancy diagnosis. By the end of this course you will be able to define placenta previa, explain the classification of placenta accreta spectrum disorders, describe what placental abruption is and its risk factors, understand how each condition is detected through ultrasound, and identify the general principles of management including delivery planning and hemorrhage preparedness. What you will learn: - The normal position and function of the placenta: what the placenta does and where it should attach - Placenta previa: definition, how it is classified by proximity to the cervical os, and why it typically resolves by the third trimester in many cases - Vasa previa: what makes it particularly dangerous and how it is identified - Placenta accreta spectrum: the three degrees of abnormal attachment (accreta, increta, percreta) and the role of prior uterine surgery as a risk factor - Ultrasound diagnosis of placenta accreta spectrum: what imaging characteristics indicate abnormal invasion - Placental abruption: definition, types, risk factors including hypertension and trauma, and presentation - Hemorrhage management principles: why delivery planning for accreta or previa is done at specialized centers - Activity restrictions commonly recommended with a low-lying placenta or previa diagnosis The course proceeds through each condition in sequence, using clear readings paired with case examples that show how a diagnosis is made and how care changes in response. Reflection prompts are designed for individuals who have received a placental complication diagnosis and want to understand what they have been told. The course treats this material with appropriate seriousness without amplifying fear. This course is designed for individuals who have received or are at risk for a placental complication diagnosis, as well as support persons wanting to understand the condition. Suitable for those who are new to this diagnosis. No prior medical background is required. This course is informational and educational; it does not substitute for guidance from your licensed obstetrician or Maternal-Fetal Medicine specialist.