I haven't seen it in print for a while but many of the older JWs still feel this way and so do the many in their 40's who don't have children. The thought being that it would be easier to survive the end without worrying about a child. For instance, if you have to flee or maybe hide and remain quiet for days during the great tribulation, that its a burden and almost impossible to do this with a child. You are as good as dead.
Some still chose to wait until they are "on the other side of this system" before having kids and some are even waiting until then to get laid, I mean married (can you say looney?) However, its still billed as a personal decision. A lot of younger JWs are actually planning out their families now as they get married and with no shame at all. They plan to work and save money for about 2 years and then start a family. No mention of pioneering, reaching out or anything super spiritual. But I'm sure like so many other things the general consensus on this issue varies by congregation or region.
Of the couples that have chosen not to have kids, not all will admit it, but some do wish they had kids. I know of at least two couples in their early forties that are now on treatments to help them out. One of the couples is now considering adoption. Not sure how well that will go over. The few folks that are in the know are already judging their spirituality and talking about them taking on a "burden" this late in the system. Of course, the answer is for the wife to spend more time with the young ones in the hall and maybe spend the time she would use taking care of the kid to occupy herself in the pioneer work (she's not a pioneer). I simply respond with some impartial response when I want to shout "Do you realize how CRAZY this sounds?"
The whole thing is really messed up.