Final answer:
The most accurate means to confirm a diagnosis of placenta previa is through ultrasound, specifically transabdominal and transvaginal ultrasounds, which safely provide a clear image of the placenta's position without radiation exposure.
Step-by-step explanation:
The most accurate means to confirm a diagnosis of placenta previa is through imaging studies. Unlike laparoscopy, which is used for diagnosing conditions like endometriosis, placenta previa involves the placenta partially or completely covering the cervix. To safely visualize this during pregnancy, ultrasound is typically the preferred method. It is a safe and effective way to determine the location of the placenta in relation to the cervix without exposing the fetus to potential harm. Specifically, transabdominal and transvaginal ultrasounds are utilized to provide a clear image of the placenta's position.
Other imaging studies like CT scans or PET scans are typically avoided during pregnancy due to the potential risks associated with radiation exposure. It is crucial to confirm placenta previa accurately since it is the leading cause of antepartum hemorrhage, which can occur if the placenta partially or completely covers the cervix as the fetus grows.