at the time I thought I was 6W 3 days , but when I had my ultrasound baby measured at 7 weeks 3 days which was also my lmp. it confuses me cuz I didn't even have sex that day , more like a week after that. so could the ultrasound be a little off?
It confuses me also but I am 18wks and today they measured my little guy at 19wks instead. I also didn't have sex around that time, but the tech last says it varies by nine days and that my doctor will still keep the same due date and everything, and that I don't need to change anything, baby is just growing a little faster than normal. It all kind of depends but your due date and everything should stay the same!

Just for fun... this is my 8 week 1 day ultrasound..any gender guesses??!!
Can you guys show me your ultrasounds from 8 weeks? I will be having my first ultrasound at 8 weeks 4 days and I'm just curious. With my son I had my first ultrasound at 9 weeks 6 days so I know this one might be a bit different.



Wanted to share with my baby bump ladies !!! This was my ultrasound pictures at 7 weeks 4 days !! I'm 8 weeks 1 day today !! Have to turn pictures upside down to see baby.. I'm in love with my little one !!!! Due date january 26th, 2019.

10 weeks 4 day appointment !! I can't believe how much baby grew in just a week!! It was so active, doing flips on ultrasound and trying to hide its face. This is the best picture I got ! Love my little acrobat !!!

here's my ultrasound 7 wk 7 days can you ladies show me your 6,7, and 8 week ultrasound, Dr said baby is measuring 6 wk 4 days but she's sending me for a more detailed ultrasound in 3 weeks, I just want to compare
The baby isn't made the day you have sex, it can take several days. So just like everyone else said they go by first day of last period.