Measuring small?

Caroline
I had a weekly check up today and my doctor said that she wants me to get an ultrasound next week because my stomach is measuring small. I'm 5'10" and she thinks it might be because I'm tall that the weight gets spread out I guess? She said she wanted to get the ultrasound to see if I needed to be induced. She said at the last ultrasound the baby was measuring at the 33rd percentile. It was one of those things where I didn't have questions of course until after she gave me all of this information. I can't figure out why she would want to induce me if the baby happened to be measuring small. Has this happened to anyone?