Feel free to PM me about the kidney thing (either now or later on depending on findings) - I recommend a second u/s at 28w (kidneys fully developed to check)
I then had another u/s at 41ish weeks because I was post due and then he had one at about 2w.
(Along with many other steps, but I can walk you thru that or not as you prefer - it's a lot of info, that you don't need until you do, so keep me in mind if you do. Also, CHB urology department has been awesome; again, if you need that)
Otherwise, I hope it's just a fluke scan and he just had to pee. Which is the other option.
Thanks so much!! One of the bonuses of having twins is that I will be having an ultrasound every four weeks for the next few months, then more as I approach my due date. So they will be keeping an eye on it with those.
If it doesn't clear in the next few months I would def like some info on how you handled it locally.