In al-Qur'ân clearly stated about human development process in uterus (rahîm) in verse al-Hajj (22): 5 and al-Mu'minûn (23): 13-14. Explanation of those verses is basic because it can be known about steps of Adam's offspring in uterus. Based on these verses, in this research will elaborate about sex determination, that implicitly stated in surah al-Insân (76): 2.
The fundamental of this research is (1) scientific interpretation of surah al-Insân (76): 2. and (2) the human’s role on sex determination. But, to understand the Islamic sciences that in holy Quran, therefore, requires an understanding about the principles of Islam itself, even though these ideas may be difficult to express in modern terms and strange to readers accustomed to another way of thinking. Must be known that sciences invention on this last decade have authenticate the truth of Allah's decree in holy Quran have legitimate role in the science effort of early Moslem scientists.
This research is a library research. In analyzing of data, first, it will be used descriptive method, this method was used as an approach to elaborate and describe mufassir or scholar thought in order to get information in their opus objectively. In other word, this is about fact finding. Then, second, it will be used scientific method—according to M. Quraish Shihab, minimally interpreter must notice about linguistic, context between word and verses; and scientific invention. Concerning the idea of this Quranic scientific, most of people who throw some critics because it only justify or legitimate new discoveries or scientific truth which relative truth from al-Quran which absolute truth. Al-Syâthibî is one of scholar that throw critic to this Quranic scientific, said that al-Quran was downed not for scientific purpose. He claimed that who did not make science limitation on interpreting al-Quran will in mistaken and wrong way. But to face this claim, that involves science discipline, in process of interpretation must be in line with Islamic law (syariah). This guidance is needful so that interpretation not outward from basic principle.
Dealing with the contribution of this research to Qur’anic studies. Writer can conclude that the purpose of surah al-Insân (76): 2 is sex determination which from analysing of term nuthfah amsyâj, mixture between male sperm and female ovum. So, human can try to decide their fetus via knowing either characteristics of spermatozoa or ovum, then knowing about foods and drinks they consume. But, during trial, they must believe on tauhid's spirit that the result only from Allah, the Ultimate One.