Lucina Sine Concubitu translates roughly to 'pregnancy without intercourse.' Here's a site that uses a 'strange book' by this title published in 1772 as a launching-off point to explore the history of the subject. It's full of fascinating and odd details such as medieval church debates about exactly how the Virgin Mary was impregnated by the Holy Ghost: was it "by way of the ear, the gullet, the nose, by way of breathing into her God's breathe, hearing God's word, being Overshadowed by a Divine cloud, etc." Or the old Roman belief that mares can be made pregnant simply by "turning east and inhaling the wind from that direction." Or whether sperm can be carried on the wind. Some of the most amusing details are the excuses that women throughout history have come up with to explain to their husbands how they managed to get pregnant even though the two haven't been together recently, such as the excuse of this somewhat naive girl: "It's true that my husband has gone a long time ago, but we write each other..."