In some respects the seven week ultrasound can be quite accurate because the embryo is developing very quickly. Original date given was 18 December but at the scan it was moved to 31 Dec. Win a Paperscapes book bundle! Well, you'd think so, wouldn't you. Gender Don't know yet Boy Girl. Filmconvert enables you may be used early dating the first one. Which pregnant celebs are due in ?
Measurements at such an early stage aren't accurate which is why they wait for 12 weeks to date you.
how accurate is a dating scan?
Thanks so much for your post — we always welcome feedback, positive or negative, as we always aim to make our articles as accurate and as helpful as possible. You'll need to activate to enter promotions - find out more. Take a look at each week of your pregnancy, from conception to birth, with our comprehensive email newsletters. Then your last menstrual period of pregnancy are our content. Obviously, every pregnancy is unique and individual factors influence the size of the embryo at this early stage, and the embryo shows development week by week. Generally, ultrasounds which are performed in the first trimester are within days of being accurate in terms of assessing gestational age.