Marty, I've noticed that, over time, diaper changes are becoming less and less public on TV. I can remember in quite a few TV shows (Degrassi: The Next Generation, The Invisible Man [2000], Dexter, Party of Five) where, when the baby's diaper needed changing, the act was performed, either in full or partially [i.e. didn't see the full change, but saw enough to know one was either about to be performed or saw enough to be given clues as to what was about to happen], but, lately, I can't tell you the last time I can remember a mention of a diaper change in a film or on a TV series and, even if it was mentioned nowadays, they tend to omit the word "diaper" (i.e. "Somebody needs a change", "Somebody's wet"). Even on soap operas [which is generally geared toward women who, at times, are home with young children), some of the female characters tend to omit the word "diaper" when talking about a diaper change (i.e. saying "needs to be changed" or "I have to change him" isntead of "needs to get a diaper change" or "I have to change his diaper").
One example I've noticed is on "How I Met Your Mother". Lily (Alyson Hannigan) and Marshall (Jason Segel) have recently had a baby and yet there have been very few mentions of their son needing to be changed [I was almost going to say "no mentions", but then I remembered they did mention it once]. I'm not saying they should discuss it every time, but once in a while, I think it would be nice to see that their son is just like a regular baby. Most of the time, it seems like he's just there for the cuteness factor [which is okay since he's an adorable baby], but I feel that the writers are neglecting showing us how life with a newborn could be. I was waiting and waiting for Alyson's character to finally get pregnant and, now that she has, I hadn't really seen a lot of interaction with the baby that, to me, makes that decision by the writers worth it.
Another instance where a baby is part of a series is "Bones", though that decision to include a baby in the characters' lives, unlike "How I Met Your Mother", was due to the main actress on the show (Emily Deschanel) becoming pregnant in real life, so they wrote it into the script. (though there has been at least one instance where Brennan's [Emily] daughter needs her diaper changed, Brennan didn't use the word. She, again, sidestepped it by saying the phrase "change her" instead of "change her diaper". It's almost like the writers are deliberately going out of there way to avoid using that word. Why? I don't know.
Well, good news is that Jules Callaghan (played by Amy Jo Johnson) on "Flashpoint" has recently become pregnant with her partner's child ("partner" as in partner on her team, though they are dating), so, in the time that they have left (it's their last season and they've got three episodes to go), I'm hoping we see the two of them at least mentioning the pregnancy again. They mentioned it once to tell the audience, but they haven't brought it up since, though Jules was vague about it with a coworker, she didn't physically mention that she was having a baby.