It contains a lot of brief, yet informative articles about different aspects of Islam. This website is for people of various faiths who seek to understand Islam and Muslims. Some of the reasons why polygamy has been allowed in Islam, from population statistics to the physical nature of humans. The New Oxford American Dictionary defines polygyny as “polygamy in which a man has more than one wife.”. Polyandry, the practice of a woman having more than one husband, by contrast, is not permitted. Under Islamic marital jurisprudence, Muslim men are allowed to practice polygyny, that is, they can have more than one wife at the same time, up to a total of four.