I well remember a talk given in the 1980's called "Responsible Childbearing in the Time Of The End". With the end " so close" upon us., we were reminded that Noah's sons and their wives evidently did not have children so as not to distract them from helping build the ark, and that the children of the wicked perished with them in the Flood, that Jesus said it would be harder for those with young children to flee to the mountains for safety, and that some of the besieged in Jerusalem ate their own children! I remember this caused quite a stir at the assembly I attended with people gathering together in the back of the auditorium and asking "Are they really saying NOT to have children?". The material later appeared as a Watchtower study article.
At present, having a family does not seem to be actually discouraged, but there still is a major pitch for young people to remain " free" for full time service, less the pioneer ministry anymore, and more on working in construction projects.
I'm sure Anthony Morris III's sons are still in. He said once, in a talk, and his printed life story that his sons "make us look good...". I've thought that one (of several) reasons for his deparure was his frank admission in an annual meeting talk, that interestingly was retained in the JW Broadcasting version, that when older ones in the 1970s told his sons they would not finish school in this system, and they asked him about this, he told then they needed to keep on the watch, as this system could go on many more years, mentioning 2020...