Unless surrogate is code for sister wife.
Considering they’ve done this twice and had twins both times, the odds are astronomically in favor of them using IVF. Now, who will ask Mitt Romney what happened to all his other preborn grandchildren that were concieved by these procedures? Are they sitting in a freezer somewhere? In a plastic bag in a biohazard dump? Being used for stem cell harvesting? Inquiring minds might like to know.