Both of these are disrespectful and, in my opinion, ridiculous.  Both sides are constructing straw-man arguments.  Pro-choicers argue:

The name ‘pro-life’ implies that we are somehow against life.  Any intelligent person knows this is ridiculous.  We just believe that this decision should be up to the mother.

Pro-lifers argue:

We are for ‘choice’ as well, and we believe that legal abortions don’t give the babies much ‘choice’.

These arguments are both ridiculous.  The names imply none of these things; they refer to positions on the central abortion argument.  No matter how you slice it, the abortion argument boils down to which you believe is more important: the mother’s right to choose what to do with her body and life after pregnancy has begun, or the unborn child’s right to have a chance at life.  Other sub-arguments (“a single cell is not a life”, “the child can be born and then put up for adoption”, etc.) are all related to this central argument, and while they’re worth talking about, they don’t change what the main conflict is.  The names reflect the two sides of this conflict, and nothing more.

I am pro-choice (by a hair), but I know that both sides have extremely compelling arguments, and to manufacture this type of disrespect is to show complete disdain for the intelligent people on the other side.