In the previous decade, preparedness consultant, survival bookseller, and California-based author Don Stephens popularized the term retreater to describe those in the movement, referring to preparations to leave cities for remote havens or survival retreats should society break down. In 1976, before moving to the Inland Northwest, he and his wife authored and published The Survivor's Primer & Up-dated Retreater's Bibliography.
However, a few unintentional similarities to the Quiverfull movement doesn't mean that preppers can't still care about safe sex. Hunting, canning, and digging your own latrines does nothing to make the threat of an STD less real. After all, gonorrhea and genital warts are going to be a whole lot harder to treat without reliable access to medical care. And there must be at least a few survivalists out there rational enough not to want to endure the horrors of premodern pregnancy and birth unless absolutely necessary.
Earthquakes, tornadoes, and hurricanes can cause you to leave your home or even be trapped there. Roads could be blocked due to fallen trees, power lines, or even damaged earth from the natural disaster. Rescue crews can not be in all places at once. You may have to wait it out for quite a while before its over. You won't be able to go to the store or to the corner market.