6-10-14 beta hcg was 226.0 retested 6-12-14 now ita 492 is this good? i was told its good when your beta hcg doubles every 48-72 hours

Yes.: Human Chorionic Gonadotropin (HCG) above 25 mIU/ml indicates pregnancy. Early pregnancy hCG levels usually starts below 1,200. It then doubles every 48-72 hours and increases by at least 60% every two days. This pattern continues until about week 10-12, when the HCG plateaus or drops. Rates of HCG increase can vary according to starting HCG. Those starting above 1200 may rise at slower rates.