What is the recommended method for diagnosing placenta previa?

• A. X-ray imaging
• B. Blood tests
• C. Ultrasound
• D. Magnetic resonance imaging (MRI)

Answer: (C)

The recommended method for diagnosing placenta previa is through the use of ultrasound. This imaging technique is non-invasive, safe for both the mother and the fetus, and provides clear visualization of the placenta's position relative to the cervix. Ultrasound can be performed transabdominally or transvaginally; the latter can give more detailed information about the placenta's location, especially in early pregnancy, when the position may still change as the uterus grows.

X-ray imaging is not suitable for diagnosing placenta previa due to concerns about radiation exposure to the fetus and the limitations in visualizing soft tissues like the placenta. Blood tests cannot provide any information about the physical location of the placenta and are not diagnostic tools for this condition. Although Magnetic Resonance Imaging (MRI) can provide high-quality images and additional information, it is not commonly used as a first-line diagnostic method for placenta previa in routine practice due to cost, availability, and the effectiveness of ultrasound.