Polyandry is a form of marriage in which a woman has multiple husbands simultaneously. This practice is less common than polygyny, where a man has multiple wives. Polyandry can be found in certain cultures, often as a way to manage land and resources, particularly in regions where agricultural land is scarce. In some societies, such as among the Tibetan people, polyandry helps to keep family land intact by preventing division among heirs. It can also provide economic stability and support for children, as multiple men contribute to the family's welfare.