I had it both times. They actually measure the fluid when they do the ultrsound. Both times they told me to take it easy (lol) not smoke (i don't) and keep up fluids. I don't think there's anything you can do - and there's certainly nothing you have done to cause it.

I was told the reason for the 'concern' is that there is no cushioning for the cord so it can get more easily damaged?

I was booked for an induction at 40 + 2( i said no way to going any earlier) and DS1 arrived of his own accord at 40 weeks. Almost no fluid left, but he was fine. With DS2 the Ob took great pleasure in showing everyone - look, i told you so he said. Typical Ob.

So the low amniotic fluid was annoying because i kept having to have u/s to check, but in the end it had no effect on the outcome.

ETA - i was told I was having little babies and one was 7.11 and the other 7.3, so not little at all.