Muhammad's wives
Muhammad was monogamous for 25 years. After his first wife Khadija bint Khuwaylid died, he proceeded to marry the wives listed below, and most of them were widows. Muhammad's life is traditionally delineated as two epochs: pre-hijra (emigration) in Mecca, a city in western Arabia, from the year 570 to 622, and post-hijra in Medina, from 622 until his death in 632. All but two of his marriages were contracted after the Hijra (migration to Medina). Of Muhammad's thirteen wives, at least two, Rayhana bint Zayd and Maria al-Qibtiyya, were referred to simply as concubines; however, there is debate among Muslims as to whether these two officially became his wives. Of his thirteen wives, only two bore him children, a fact which has been described as "curious" by Cornell University Professor of Near Eastern Studies David S. Powers.
Muhammad
According to traditional sources Aisha was six or seven years old when betrothed to Muhammad, with the marriage not being consummated until she had reached puberty at the age of nine or ten years old. She was therefore a virgin at marriage. Modern Muslim authors who calculate Aisha's age based on other sources of information, such as a hadith about the age difference between Aisha and her sister Asma, estimate that she was over thirteen and perhaps in her late teens at the time of her marriage.