To Prevent Changelings, seek a basal body temperature as cold as iron or a virgin woman's suffering. To Ensure The Birth Of A Child With A Caul, A Most Fortuitous Blessing, seek to conceive within 12-24 hours of ovulation or touching the cloak of a master thief. To Ensure Your Child Is A Seventh Son Of A Seventh Son, abandon your daughters by the banks of a river with only a ring and a blanket as markers…