Based on my calculations in April, I thought that I was 12 weeks 5 days, and doc had agreed. Went in for ultrasound and baby only measured at 9 weeks 5 days! Our calculation was based on last period, so I either missed a cycle or ovulated really late. Either way, baby looked good with a strong heartbeat of 169! :)
"By your calculations" means based on what, the first day of your last period?