According to Mormon teaching marriage is eternal and so is pregnancy, the men serve god for all time, the women produce spirit children to raise, along with all the ghosts of infant mortality, miscarriage and abortion.
However if you make it in to Mormon super heaven you can have a slave to help you, these are the ghosts of all the black people who died before 1979, when god changed his mind and decided black people were human after all.
With this extra help you might one day become a god yourself and populate your own planet with all of you wife's spirit progeny.
So that is something to look forward too.
Actually this question is there.
After death according to the bible we are free from human "limitations" and we don't have the reproduction task, thus sex, gender and family becomes irrelevant as we get close and direct contact with the creator.
I am not saying that I believe in this stuff, I am just reporting the way it is written.