If your doctor has prescribed duophaston and progesterone pills for your anterior low placenta, it is important to follow their advice. These medications are commonly used to support the development of the placenta and maintain a healthy pregnancy. They can help prevent complications such as bleeding or premature birth associated with an anterior low placenta. It is crucial to discuss any concerns or doubts you may have with your doctor before making a decision about taking these medications. They will be able to provide you with personalized guidance based on your specific situation and medical history.