That's how fast the baby's heart is beating. The doctor says it's a normal speed. I have to tell you, when I heard that little heartbeat and actually saw it on the ultrasound machine, I was in shock for a minute or two. That's a little person in there. A person that never existed before, anywhere in the world. A little person that has my and Jenn's genetic code written all over him/her. When I sat back down in the waiting room, I cried a little. Probably won't be the last time either. A little person is living inside my wife - my child.
That little arrow is pointing at the baby. There's not much to determine from the picture, but do you see that little tiny round dot just to the right of the arrow that looks like a bullseye? That is the baby's heart. It may not look like there's much there right now, but look at the last ultrasound three weeks ago to compare the two.
The round black circle was just the beginnings of the pregnancy.