God your xH is just so weird sometimes, isn't he? I actually laughed when I read his suggestion. Erm, jog on, mate.
The scan was lovely, thank you - little mouth sucking on little fingers, arms and legs a-waving, and in a perfect position to get all the measurements they need. Last time DS wouldn't stay still for them, was just turning somersaults all the time, and the sonographer got rather mardy about it all, jabbing at me repeatedly. This one was a dream, a very calm, pleasant woman- it's a different hospital as we've moved - and I feel very happy about it! H and I just sat there with mad grins on our faces - oh and the heartbeat noise! I'd forgotten how heavenly that gallopy heartbeat noise is! I did get a bit misty-eyed at that point. First time I was pregnant I heard it on the booking-in appointment, around 8 weeks - and burst into tears. Heh. Not that it takes me much to burst into tears while pregnant. I saw a dear in the woods yesterday while walking the dog and I was blundering about blurry-eyed for ages after!
I think you name your son, and present him, named, to the xH. I think that's how it goes. Are you having fun thinking of names and imagining? DH and I have a girl's name in mind (the one not used last time, when DS emerged!) but are discussing middle-names and stuff. As for boys, we are absolutely at square one. We quite fancied using DH's lovely grandfather's name, (Martin) which I don't love but don't mind.... until we heard it pronounced in an American accent, and then H said "oh god no, never, oh no." .... and he had a point! 
. But after the scan we went to McDonald's (we're so posh! But it was practically a date because DS wasn't there!) and held hands and scoffed chips and it was really really real! And that was fun. I think we both believe it a bit more, and so the odd "what do you think of Charles? no?" conversation keeps cropping up. 20 weeks is when we'll find out gender too, and from there I think we will have a more focussed name-plan.