I went for my first visit today and I was suppose to hear the hb because based on my last period I am suppose to be 11 weeks. Well he did an ultra sound and said i am only measuring 6 wks and wants me to come back next week. What difference is 1 week going to make? I also had an IUI on June 14. He never turned the sound on while doing the ultra sound to check for a hb that way!