Bowel dilatation in a foetus - experiences please

We had our 21 week fetal assessment scan...Some worrying news that our baby boy has dilation in a section of his bowel.  It could be caused by a number of things but no way of knowing for certain.

I have been doing a bit of research but it would appear there is a broad range of possible causes and outcomes.

Basically it looks like there is a blockage or narrowing which is causing that section to become distended with fluid. The doc says there is a small chance it could go away on its own but more likely that it will stay that way or worsen as the pregnancy progresses. I am going for another scan in 2 weeks so he can see if anything changes. There isn't anything that can be done until he is born so I have to try to remain positive about it.

I would like to know if there are any moms on here who have experienced this during their pregnancy and what the outcome/treatment was.