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.
Fatimah
Fatimah was born in Mecca to Khadija, the first of Muhammad's wives. There are differences of opinion on the exact date of her birth, but the widely accepted view is that she was born five years before the first Quranic revelations, during the time of the rebuilding of the Kaaba in 605, although this does imply she was over 18 at the time of her marriage, which was unusual in Arabia. Twelver Shia sources, however, state that she was born either two or five years after the first Qur'anic revelations, but that timeline would imply her mother was over fifty at the time of her birth, according to Sunni sources.