Why is my dr doing a fallopian tub X-ray before ivf?

I have pcos and the only option now is ivf. When the dr office called about doing the X-ray on cd 12 I ask why and the lady said she would have to call me back to explain because they were very busy. I haven’t had a call yet 🤷🏼‍♀️ so anyway I thought the whole point of ivf is completely passing the Fallopian tube area?