Had a growth scan at 35+6 yesterday, and one twin had dropped centiles and hardly grown since the last scan (4 weeks ago).
Twin1 gone from 1.8kg to 2.8kg
Twin2 gone from 1.7kg to 2.1kg
They've referred me to fetal medicine, but as it was Friday afternoon, said no one will call until Monday morning 
Anyone have any experience / advice? They're dcda btw.