Polyandry is a form of marriage where a woman has multiple husbands at the same time. This practice is less common than polygamy, where a man has multiple wives. In some cultures, such as among certain groups in Tibet and Nepal, polyandry helps keep family land intact and ensures that resources are shared among a smaller number of heirs. In polyandrous relationships, the husbands may be brothers or unrelated men, and they often share responsibilities for the household and children. This arrangement can promote cooperation and reduce competition among the husbands, creating a unique family dynamic that differs from traditional monogamous or polygamous structures.