I had an odd issue. I cannot tell you the circumstances precisely. Basically, the game crashed for unknown reasons(Possibly due to pregnacies-I'd been using on preventatives). I had around 45 girls working, maxed out, full health, no tiredness, the works, mostly customs from the Slave Market and random wandering. I loaded the auto-save; it seemed fine, hit 'next turn'. All but the first 8 I had recieved were pronounced dead and removed from the game. very strange. I don't know what caused the initial crash, so I couldn't tell you what the problem was.