Ohhh what is gas and air?!!? Ya, why don't we have that here?!
It's the same stuff as laughing gas! A mix of oxygen & nitrous oxide (I think). All labour wards here have it available & MWs also bring it to home births. It was the only 'pain relief' I had last time. It's weird stuff. It doesn't actually take the pain away but makes you not feel bothered about it somehow. It definitely helped me through the transition phase of labour last time when I started to lose it a bit. It has no lasting effects on you or baby & is out of your system as soon as you stop puffing on it so is a popular pain relief choice here. You US girls should have access to it, definitely.
Glad the growth scan went well, kksy. I agree with bookworm, 10 days behind is nothing. You've just made a petite baby