LUD?????

[Meluchja]

What was it used next to? Was it just a note.

I found this from google

LUD - left uterine displacement

But I'm not sure what that would mean in your case. But it could just be an abbreviation that your OB has made up for herself IYKWIM .
I know what it is like to want a meaning to everything, I remember when I was pregnant and read Prosterior OS, I searched and searched until Alan finally told me it meant that I had a cervix facing the opposite way, no big problem but just one of those things noted by your care provider.

I would ring your ob's office and talk to anyone that can give you a meaning to help settle your curiosity. After all, your are paying for their services