At 5w4d pregnant my hcg level was 8, 250. at 7w3d pregnant my hcg level was 36, 350. saw heartbeat 7w3d at 158. concern: levels rising quick enough?

HCG: Hcg levels are quite variable and there is a wide range for weeks of gestation. A positive rate and a large jump in thehcg like you've experienced is a good sign, and everything is likely to be fine. Following up for regular visits and reaching the milestone of cardiac activity heard at 12 weeks usually indicates a greater than 80% chance of carrying to term. Good luck!

Yes: Once one see the heartbeat, the levels become less and less important. There is wide variation in the "normal" numbers of hcg. Thus, now that you've seen a heartbeat i wouldn't worry for one second that the pregnancy is progressing appropriately. Good luck.