My E2 on Day 6 (after 5 injections of 250 puregon) is 1850, Day 8 (7 injection) is 4400 and Day 11 (10 injection) 7080, I triggered on D11 and had EPU on Day13. FS said my level is really good. Anything under 10,000 before EPU is ok, but higher than that would rish OHSS. Hope it helps.