What is placenta previa?

Placenta previa is characterized by the placenta being positioned in such a way that it partially or completely covers the cervical opening. This condition can lead to complications during pregnancy and delivery, as it may cause bleeding and impede the safe passage of the fetus during childbirth. When this occurs, it typically requires careful monitoring and may necessitate a cesarean delivery to avoid risks to both the mother and the baby.

It's important to understand that although a low-lying placenta can sometimes resolve by the end of the pregnancy, placenta previa specifically involves the placenta obstructing the cervix, which poses a greater risk. Other conditions, such as placental abruption, involve the placenta detaching from the uterine wall rather than abnormal positioning over the cervix, making it distinct from placenta previa. Therefore, the critical detail that defines placenta previa is its direct impact on the cervical area during pregnancy.