Placenta maturity grade 3 at 34 weeks - worried 🙁

Lyanna

I had a growth scan today and the report says my placental maturity is grade 3 and fluids are just adequate. I believe this is early placental maturation as google says grade 3 is seen after 37 weeks? Anyone has experience regarding this? My OB is not concerned immediately as doppler and size etc. seemed ok but I have to really monitor movements closely. Anyone else going through something like that?