Once the egg has been fertilized in the fallopian tube, it descends to lodge itself inside the uterus. This process is called the ‘implantation of the egg’. Implantation is a result of the development of villosities, which, like roots in the soil, draw nourishment from the wall of the uterus and make the egg literally cling to the womb. The process of implantation is appropriately described in several verses by the word ‘alaq, which is also the title of the chapter in which one of the verses appears:
“God fashioned humans from a clinging entity.” Qur’an, 96:2
The evolution of the embryo inside the maternal uterus is only briefly described, but the description is accurate, because the simple words referring to it correspond exactly to fundamental stages in its growth. This is what we read in a verse from the chapter al-Mu’minoon:
“I fashioned the clinging entity into a chewed lump of flesh and I fashioned the chewed flesh into bones and I clothed the bones with intact flesh.” Qur’an, 23:14
The term ‘chewed flesh’ (mudghah) corresponds exactly to the appearance of the embryo at a certain stage in its development.
It is known that the bones develop inside this mass and that they are then covered with muscle. This is the meaning of the term ‘intact flesh’ (lahm).
The embryo passes through a stage where some parts are in proportion and others out of proportion with what is later to become the individual. This is the obvious meaning of a verse in the chapter al-Hajj, which reads as follows:
“I fashioned (humans) a clinging entity, then into a lump of flesh in proportion and out of proportion.” Qur’an, 22:5.
Next, we have a reference to the appearance of the senses and internal organs in the chapter as-Sajdah:
“… and (God) gave you ears, eyes and hearts.” Qur’an, 32:9
Nothing here contradicts today’s data and, furthermore, none of the mistaken ideas of the time have crept into the Qur’an. Throughout the Middle Ages there were a variety of beliefs about human development based on myths and speculations which continued for several centuries after the period.
The most fundamental stage in the history of embryology came in 1651 with Harvey’s statement that “all life initially comes from an egg”. At that time, when science had benefited greatly from the invention of the microscope, people were still arguing about the respective roles of the egg and spermatozoon. Buffon, the great naturalist, was one of those in favor of the egg theory.Bonnet, on the other hand, supported the theory of ‘the ovaries of Eve’, which stated that Eve, the mother of the human race, was-supposed to have had inside her the seeds of all human beings packed together one inside the other.https://www.youtube.com/watch?v=HsD2Dnbd4ps