Question: Will husband and wife live together after the resurrection is completed, if both are in harmony with God?
Answer: The Scriptures do not reveal what the relationship of men and women will be after the resurrection is completed. The most that we know is that there will be no children born during the last 100 years of the Millennium (Isa. 65:20), nor any born after that, because men and women do not have children after they reach the age of 100 years. Whether the identity of the sexes, as such, will be preserved, we do not know. There have been some well authenticated instances in which women have been transformed into men, and it is possible that this transformation may become general and we shall be brothers together.
Golden Age, 4-2-1930, p. 446