My scan has measured behind since the beginning. At 6 weeks there was just a sac. At 7 weeks there was sac, yolk sac, fetal pole of 4mm but no heartbeat. The sac had only grown a mm or two in that week. So that this point I was 7 weeks, the baby measured 6 weeks, and the sac measured 5 weeks. Also in this week my hcg only doubled once from 11000 to 22000. At this point we pretty much knew it was not a viable pregnancy. Today at 8 weeks all measurements were pretty much the same if not a little smaller. The sac was not round anymore but rather bean shaped. The doctor said you could see "bubble looking" things along the edge of the uterine wall. I don't know what they actually are but she says they form when the pregnancy is detaching. I'm glad to finally have an answer even if it's not the one I wanted! Dr. said I could start to bleed in a couple days or a couple weeks.
we want to try again as soon as possible. This little bean took us a year and a half to conceive.
I hope your hcg is rising! I'll check tomorrow for your update.....