Difference between ultrasound and HCG Levels

[ss27]

I had my first pregnancy appointment last week and with an ultrasound saw the baby with a heartbeat.  The doctor told me the baby measured at 5 1/2 weeks although I thought it was more like 7 1/2 weeks due to the date of my last period.  Today, they told me that my hcg levels appeared high for 5 1/2 weeks (but said the ultrasound was more accurate for dating).  What does it mean to have high hcg levels?  I wasn't told the exact level and am very worried that something is wrong.

[esantise]

This happens quite a bit.  Keep in mind that everything is an ESTIMATE.  (EDC = estimated date of conception, (EDD - estimated due date)  The earlier the ultrasound the more accurate they are.  But from personal experinece not 100%.  HCG levels are your bodies way of letting other parts know you are prego.  They vary quite a bit some people at four wks have 200...and some have 600.  There is quite a bit of room for error there.  
Also another reason you may think differently and the dr thinks dates are different are more bc of not all woman have the same cycle lenght.  Even though you may go 28 days between periods you might not ovulate on day 14.  You may ovulate on day 18.  : )  HTH some.
Erin

[chellybeans]

another reason to get a high hcg is twins. that is my case

[Buuba]

My Hcg levels at 4 1/2 weeks was 1921 4 days later it was 9509. At 5w5days it was 30909. I have three ultrasounds no signs of twins yet. My grandmother had 3 sets of twins and my mother had twins. I am a little worried it could be something else. I have already had 3 miscarriages in 2 years and very paranoid even though my obgyn is telling me so far so good. I have another ultrasound 4/27 to listen to a heartbeat. I hope all goes well. At this point I will be so happy to hear one heart beat than two, after all of I have been through.

[missed]

I am a 38 year old mother of three had tubal after the third child .Last year I became pregnant and missed carried. I am pregnant again. I was very scared went to doctor confirmed but don't know where the baby is had hcg done was 1800 then 48 hrs later over 2200.The doc I was seeing did not make me happy .So I am going for a second opinion on next Wednesday. I am feeling very pregnant and hoping for the best .For those interested I will keep you informed.   Thank Missed