t wait because the earlier you are the more accurate the measurement will be. Ask specifically for the EDD (an estimate of your
due date) based on the crown-to-rump measurement of the embryo.
Remember, doctors and ultrasound techs will tell you a number of weeks 'pregnant' that starts on the first day of your last period, not because they think you got pregnant on day 1 of your cycle but because that is where they start counting.