What things can I do to treat placental insufficiency at home?

Keep appointments. It would be quiet essential that uou keeo your prenatal appointments so that your doctor can monitor the well-being of your fetus. Beyond that, there is probably nothing more specific that you can do for placental insufficiency. Maintaining a well balanced diet, keeping well hydrated, and taking your prenatal vitamins would be the most you could likely do on your own.
Bed rest. If you have that problem you must be followed very closely by your OB doctor who i would assume is working closely with a peri-natologist as you will need close following with frequent ultrasounds and other testing and most likely will need delivery before your due date.