Mmmm, a man's sperm is plentiful. You don't need very many men to fertilize eggs. Women can only carry a baby for 9 months. If I was going to populate, I would take several eggs from women and freeze them.
That being said, a few months ago a place where they stored eggs and embryos malfunctioned. Said it was the freezers. Perfect timing and excuse to take the eggs and embryos out and store them elsewhere.