“Possibly the most devastating aspect of Islamic slavery was the castration of male captives. The worst casualty of castration was obviously the robbing of man’s most fundamental identity and treasure –his manhood. The greatest tragedy of castration was, however, the massive mortality in the operation. Only 25 percent of the victims of castration survived the operation. “Islamic civilization did indeed practice castration of slaves on an unprecedented scale. Several cities in Africa were real factories of eunuchs. They were an expensive commodity.” p.333 “Muslim harems and households used to have a few to thousands of wives and concubines. Caliph al-Muqtadr (908) had assembled in the Baghdad palace some 11,000 eunuchs. p. 313
Taken from the book: Islamic Jihad, by M.A. Kahn