I guess I disagree on this one - regarding MY pregnancy, NOT yours. I see your viewpoint, and I respect it, as it's your body and your choice how to refer to your pregnancy.
Personally, when I had my first, I included my OH in the whole process, with "we" the entire time. I am the only one carrying the baby, clearly, but my OH is my support system... I wouldn't be able to do this without OH. OH will rub my sore back and feet at the end of every day. OH coaches me during labor and hugs and holds me as I cry out in pain in the last few hours of labor... My OH runs out and gets what I'm craving at 2 or 5 am if I "NEED A BAGEL RIGHT NOW". Yeah, we've had that a few times. haha. And my moooooooods. Yessssssss. I had postpartum depression twice, and I was a messsssssssss. I do not feel like I would have survived that alone. I got extremely suicidal, and my OH kept me safe and got me the help that I needed.
Now, I'm expecting my fifth, and my subsequent pregnancies have been different. The "we" who is getting a baby now includes my children. I teach them "we" so they're involved with the pregnancy and are thrilled to get a new sibling, and they help me out throughout my pregnancies just as much as OH does, and they help care for the new baby, too. So, I use "we" as a term to include my family in the pregnancy and the bringing up of the baby, and it works for our family...