http://www.ob-ultrasound.net/
http://radiology.creighton.edu/pregnancy.htm#section4
These two websites are also very helpful. They tell you a lot about u/s during early pregancy, as well as the mean gestational sac size, fetal pole size, etc.
I originally thought I was 6 weeks pregnant, turns out I'm only 4-5 weeks. I was bleeding so they did an u/s last week. At 4 weeks all I could see was a sac and a little circle. That circle is my baby. That's what you'll see this early on. Good luck!
4 weeks means 2 weeks from ovulation, i.e. just around the time we start taking our home pregnancy test in anticipation! I think very few people even get u/c at this point, and you really see very little at this point.
3 weeks means one week from ovulation and conception: the pregnancy test will not even tell yet you that you are pregnant. So if you are 3-4 weeks, you shouldn't worry about seeing anything!
hi im on my 5th child all great while pregnant went for u.s this morning measured just about 6 weels saw sack no heartbeat or small bean to go back in 7 days to have another u.s ive had no bleeding or cramping really paincin ...anyone any had the same sort of thing as me...x
if you read darkestlights post above she had the same type of thing.
some girls don't see that little bean and heartbeat until 8 weeks and maybe even further.
remember everybaby grows at its own pace.
good luck