They plan to name the fetus based on its gender so, if God has chosen to make it an hermaphrodite, as He does much too often, perhaps they will call him/her Amblimope Hellnry Duggar.
And, when they all get to Heaven and greet dear Amblimope, all of their shared background and experience will limit them to something like "God loves everybody and everybody loves everybody else" because little Amblimope has none.
Then, lacking any other point of commonality, they will drift off into an eternity of mental silence indistinguishable from the endless void that atheists expect following their deaths.
For the miscarried individuals of any family, this principle will apply to each characteristic that theists so cherish in their view of the afterlife spent in close loving companionship with loved relatives. In fact, those moments, if they occurred at all, would be brief and would quickly fade into the otherwise featureless background void of eternity.
"I have stared eternity in the face much too often and, believe me, eternity is not nearly as interesting as the theists wish you to think." Anything, no matter how shocking and remarkable it might seem at first, pales to a featureless background when you have seen and done it the first few hundred billion times out of a total infinity of times.
I have a low threshold of boredom; I don't like saying something the same way twice in a row; Hell, I don't like saying it the same way even
once in a row.