Hi, I had this with my 2nd. Was resceanned at 32 weeks and the fluid had level had increased.
Trying hard here to avoid mentioning sex of my baby as it is common in a certain sex adn don't want to spoil it if you don't know.
Anyway my baby was placed on antibiotics at 11 hours old (small dose daily) he is almost 2 and is still on it, it is weight controlled so regular weight checks for correct dose.
Little one is under consultant who we see 6 monthly was 4. Has had a few scans and checks and so far it is still enlarged. Worst case scenario is will need small op at the age of 3-5 if doesn't right itself.
My little one is not showing any signs of being ill because of the the rapid treatment due to scan picking this up, so it is a good thing.
If you have anymore questions please ask me, I am almost 2 years in with treatment plan and it really isn't as scary as it sounds when you first get told all the information.
The tests are a little intrusive and not pleasant to watch but they are so young when it is carried out it is forgotten very quickly.
It is also common for this to right itself before the next scan so try not to worry too much now.