Growth scans

I have been Haveing growth scans since 28 weeks am now 34 and still Haveing to have them at 31weeks and 4 days she measured 3.12oz and my 34 week one she was comeing in at 4.02oz I have to have another one in 2 weeks I was told she's not grown she's "mentained" although it shows growth on the chart has anyone been in this siduation and have they made the baby come early? Heart and placenta is fine