I don't know all the in's & out 's but a friend from my MG had an amnio & the hole started leaking that night. So i would say around the same gestation. Her waters got very low to the point that just his head was in the fluid. I know they were concerned that if it dropped anymore then his head wouldn't be covered. He happened to be head down. There was a huge risk of infection due to the hole & at various times had ab's when blood tests showed a risk of infection. The hole sealed it self up over time & she ended up with more fluid at the time of his birth than is usual. She had a couple of steroid injections towards the end just to help with his lung development as a precaution & had to go on leave from work & rest. Regular scans, blood tests & monitoring. He was born on his due date perfectly healthy.

From your post you haven't said how your friends waters have become so low. Does she have a leak? Is it a condition within her pregnancy?