Hi All. When I went in for my u/s on Monday, baby was measuring 7w5d and heartrate was 162bpm. I was just looking up heart rates, and I found this article (link below). Basically, it says heartbeat increases 3bpm per day in the month after the 5th week. Since one week before the heartbeat was 124bpm by u/s, how could it have increased so much? First of all I am freaking myself out (because I am so worried about losing this pregnancy). Secondly, the article says sometimes they date the fetus by heartrate. I thought I was due Jan 16, but based on measurements, I am due Jan 26. What do you think? Am I driving myself crazy for nothing?