Ovarian Torsion causes lots of pain and vomiting. If you want to get a transabdominal ultrasound you need a full bladder. Also Motown is cool.

Lyrics

It’s a fallopian twist of fate
Pain and vomiting won’t abate
You thought it was gas
And that it would pass
But now you hope it’s not too late

Ultrasound of the belly
Transabdominal needs jelly
A full bladder as well
Ovary’s deep in the well
Blood flow I hope we will see

[Chorus] Torsed again!
It’s a cruel twist of fate
Consult Gynecology
Before it’s too late