I know of one couple that remained childless solely for the New Dark Ages. The wife is a regular pio-sneer, and the husband is a hounder. He was born in and went to Beth Hell as well. They were about 25 or 30 when I went in, and are now more than 45.
I wonder what they are going to do when they realize that they are going to die childless, and there is no hope for them to have children now.