I have a question about ultrasounds and if anyone knows if a different machine could cause different results? This is my first pregnancy and have some concern about growth. I went to my first OB GYN appt last week and they measured my growth to be at 7 weeks 2 days which put me a week ahead of my lmp. 1 week later I had a bleed due to an SCH and had another ultrasound at the emergency room which measured me at 7 weeks, 3 days when according to the original scan I should have been at 8 weeks, 2 days at that point. Does anyone know if the difference could be due to the different ultrasound machines and/or the way the tech did the measurements? Each time I had a strong heartbeat. The first scan it was 134 bpm and the second scan a week later was 169. Seems like a good sign the bpm went up but I still have concerns. I will see my OB GYN again this week but if anyone has any experience with this I would appreciate the input. Thanks!