The complexities of human reproduction were decoded and understood only after the invention of the microscope which was hundreds of years after the death of Muhammad, peace he on him. However, the Qur'an refers to the stages of development that human embryo undergoes. Allah says:

"Man we did create from a quintessence (of clay);

Then we placed him as (adrop of) sperm in a place of rest, Firmly fixed;

Then we made the sperm into a clot of congealed blood; then of that clot we made a (foetus) lump; then We made out of that lump hones and clothed the bones with flesh; then we developed out of it another creature. So blessed he Allah. The Best to create!"7.

As it has been scientifically proven, the stages of human reporduction are: «1- Fertilization of an ovule which takes place in the Fallopian tubes. The fertilizing agent is the male sperm. 2- The implantation of the fertilized egg which takes place at a precise spot in the female reporductive system: it descends into the uterus and lodges in the body of the uterus.

Once the embryo begins to he observable to the naked eye, it looks like a small mass of flesh. It grows there in progressive stages which are very well known today; 7. turban 23: 12, 13, 14. they lead to the bone structure, the muscles, the nervous system, the circulation. and the viscera, etc»8. In conclusion, Dr. Bucaille ascertains: «More than a thousand years before our time, at a period when whimsical doctrines still prevailed, men had a knowledge of the Qur'an. The statements it contains express in simple terms truths of premordial importance which man has taken centuries to discover». 23. The Bible. the Qur'an and Scicnce. p. 199.