Allah's Choices in Determining Prophets. Since the time of the first human (according to Islam), Allah has chosen 26 people to be His prophets. All 26 have been men. Not one female was deemed worthy to be a Prophet of Allah.

In Quran 21:7, we read that Allah explicitly indicates that he did not choose any female prophets:  "And we sent not before you, [O, Muhammad] except MEN to whom we revealed [the message] so ask the people of the message if you do not know."  Similarly, Quran 13:38 states:  "And verily We sent messengers (to mankind) before you, and We appointed for them wives and offspring," [the messengers are thus married men].
Why did Allah refrain from having any female prophets? We must recall that the Quran indicates that Allah favors men over women (Quran 4:34) and that Allah has made men a degree above women (Quran 2:228).  Our Debate Question is:  Does the fact that Allah chose not to have a single female prophet affect how Muslim men regard Muslim women, and how Muslim women regard their own capabilities?