i went it for a checkup yesterday & was suprised to find out i was going to have an early ultrasound. (the dr. thought i was measuring a little big... but found out my uterus is just tilted and making me measure wrong....) It was so awesome to see the baby moving around and be abe to see all of the parts in the right places. i can't believe how fully they are developed at only 13 1/2 weeks! the lady said its hard to tell the sex this early cause boy and girl parts tend to like a like until a few more weeks out. i'll have another ultrasound in about a month to find out exacty what we're having. anyway, she said i am measuring about 5-6 days further along.