Ay congrats sa malapit nang delivery! Honestly, walking, light stretching, and pelvic floor exercises are what most of my mum friends swear by around this stage, walang guaranteed magic pero nakakatulong talaga sa body prep. I'd definitely check with your OB first though, especially since you're already at 37 weeks, para sure na okay lang lahat for you and baby given your placenta grade at everything else, they might have specific suggestions based on your situation!