Mar 31, 2016 · 31/03/2016 at 12:48 pm. i think it is usually around 10000 before they expect to see anything at all on screen. at your stage in pregnancy the hcg levels and the scan sound fine i think. i had a scan at 5 weeks and saw an empty sac.at 6 weeks, sac with a fetal pole and a yolk sac.at 7 weeks, a tiny flicker. 0.. "/>.