Breeched baby mommies

Ashley • 20. First pregnancy.
My baby girl was breeched from the beginning of my pregnancy till the day I went for my c-section, my hospital does ultrasound on breeched baby's hips and I wasn't really told much about any of it so I was wondering if someone could help and explain it to me. My main thing is what happens if something is wrong with her hips? Also how they do the ultrasound?