Hollo, I didn't do pg pilates but I wish I did! I did pilates before pg and have recently started again. It is awesome for core strength (so great to help prevent lower back pain) and also for pelvic floor muscles. It's not hard on the body, you can do gentle pilates. Pg pilates targets the pelvic floor and tummy muscles and these are very important for labour and birth and also post pg (can't stress how important strong pelvic floor muscles are).