If you're a witness couple and you choose to have a child together, it means you think armageddon is not going to arrive for at LEAST 9 more months. And then you'll be nursing it for at least 6 months.
That's almost a year and a half. If armageddon started within that time: WOE TO YOU!
But woe to those who are pregnant and to those who are nursing babies in those days!
And you probably don't want your child to have to live through armageddon while it's young, that would suck. Even if you live forever you only get one childhood. Who would want their one and only childhood to be spent cowering on a mountain being fed mannah or canned beans while billions of people are slaughtered around you?
So having a child now indicates to me that you don't think armageddon isn't gonna come for at least 10 years or so. Either that or you think it WILL come within that time and you are a horrible person.