That is good news, I had to get several because my baby was turning a lot. But you should not have more than two, my doctors said the same. My doctors also said that extra ultrasounds may not be necessarily good for the baby. I had to have five and will probably need one more because my son is measuring on the bigger side.
That's what my doctor told me also. She would only do another if something is wrong. I'll be getting a 3D ultrasound tomorrow which I'm paying for. So I can see baby again. My last one was at 20wks I am now 30wks.
That's typical. I had the same two. They only do one later if they suspect something is abnormal. Sometimes you can go to an ultrasound studio and get one but you pay out of pocket.