Has anyone ever thought, before the Quran was revealed, that man’s nutfa, when ejected, is responsible for determining if the embryo will be male or female? Has this ever occurred to one’s mind? The Quran says;
“That He created the pairs, male and female, from a fluid-drop sperm as it is emitted.” (Quran 53: 45-46), confirming that man’s gender as male or female is determined when the sperm drop is emitted. Who told the Prophet Mohammed that the sperm (nutfa) with one of its types (Y) or (X) is responsible for determining the sex of the embryo?
History of embryology
The theory of the full dwarf embryo existing in man’s sperm or full dwarf embryo created out of the woman’s menstrual blood coagulation remained the dominant theory of embryo creation till 18th century.
On the other hand the holy Quran since the 6th century has described in full and accurate details the stages of embryo development which have been confirmed scientifically throughout the last century.
"Then We placed him as a sperm-drop in a firm lodging.* Then We made the sperm-drop into a clinging clot, and We made the clot into a lump [of flesh], and We made [from] the lump, bones, and We covered the bones with flesh; then We developed him into another creation. So blessed is Allah , the best of creators.." (Quran 23:13-14)
Sperm fertilizing egg
While hundred millions of these sperms (500 m.- 600 m.) enter through the vagina to the uterine cervix, only one sperm is able to fertilize the ovum.
“He It is Who created all things in the best way and began the creation of man from clay, and made his progeny from an extract of despised fluid (Sulalah)” (Quran 32: 7-8)
The meaning of Sulalah is "extract", means the essential or best part of something. By either implication, it means "part of a whole" indicating that the origin of creation is from only part of man's fluid and not all of it.
“Verily We created man of a fluid-drop (nutfa), mingling (amshaj), in order to try him: so We gave him (the gifts of) hearing and sight.” (Quran 76:2).
The mingled nutfa in this verse reveals the Quran miraculous nature. Nutfa, in Arabic, is a single small drop of water, but it was described here as (amshaj) , which means its structure consists of combined mixtures . This fits with the scientific finding, as the zygote is shaped as a drop, and is simultaneously a mixture of male fluid chromosomes and female ovum
"Then We made the drop into "alaqah" a leech-like structure." (Quran 23:14)
The word "alaqah" refers to a leech or bloodsucker. This is an appropriate description of the human embryo from days 7-24 when it clings to the endometrium of the uterus, in the same way that a leech clings to the skin. Just as the leech derives blood from the host, the human embryo derives blood from the decidua or pregnant endometrium. It is remarkable how much the embryo of 23-24 days resembles a leech.
"Then of that leech-like structure, We made "mudghah" a chewed lump." (Quran 23:14)
This statement is also from Sura 23:14. The Arabic word "mudghah" means "chewed substance or chewed lump." Toward the end of the fourth week, the human embryo looks somewhat like a chewed lump of flesh. The chewed appearance results from the somites which resemble teeth marks. The somites represent the beginnings or primordia of the vertebrae.