With DD as a first time mumma I had her weighed as often as you were 'supposed to'. But on the upside I loved my MCHN and we always had a great chat.
DS on the other hand only got weighed at the required immunisations...only because there was nowhere to have it done outside those times.
I actually wouldn't have a clue how much he weighs now he's actually decided to eat (and eat and eat and eat) and couldn't figure out why his nappies weren't cutting it anymore - cos he was 2 and a bit kgs heavier than I thought lol.