Very first ultrasound today. How accurate are ultrasounds at calculating pregnancy?

Question

Today we had our very first ultrasound for baby #2. The ultrasound technician said we were 6 weeks and about 1 day... Which isn't accurate to the first day of my last period, it actually says I got pregnant before my period even started.. Not many days off.. Three days before the first day of my last period is when they are calculating I got pregnant (based on the 6 wks.)

I am curious if this could be severely off.. Has anyone ever been told they were 6wks and found out later it was more like 9 or 10wks or  would that be a huge difference on the ultrasound? She said I had to be 6wks because you could see the heart fluttering..

Thanks! (=

Answer

That's definitely a 6 week ultrasound(: Congratulations.

Answer

My ultrasound this week said 7 weeks 1 day according to my lmp as well, but the tech said that I measure a week earlier at 6w1d. I figured she was probably right because my husband and I only bd twice last month and the first time would have put me further so I know it was the second which was later in the month. It was kind of a inactive month so I'm surprised I got pregnant! 😄 but the lmp thing is usually what they first go by to get an estimate unless you know exactly when you conceived. The ultrasound I think is more accurate then going by your lmp. In my opinion but always a good question to ask your OB 🙂

Answer

You ovulated sooner then you thought so they say you are 6 weeks like if the first day of your last period was 6 weeks ago. Does that make sense ? Lol like my lmp was October 12th an I ovulated early on cd 10 so that means I conceived on cd 10 and my due date is July 13th I am 6 weeks 2 days.

Very first ultrasound today. How accurate are ultrasounds at calculating pregnancy?

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