why did allahh swt not sent a female messnger or prophet ?

What kind of book is Qur'an?

The Messenger of Allaah (peace and blessings of Allaah be upon him) said ?Whoever reads one letter from the Book of Allaah will earn one good (hasanah) thereby. One good deed is equal to ten good deeds the like of it. I do not say that Alif-Lam-Mim is a letter, but Alif is a letter, Laam is a letter and Meem is a letter.??

Narrated by al-Tirmidhi, 2910; classed as saheeh by al-Albaani in Saheeh al-Tirmidhi, 2327