Islam gives legal precedence to purity of lineage and known parenthood of all children. In Islam treatment to infertility using IVF is permitted within validity of marriage contract with no genes mixing. The paper shows that the Qur'ān, the word of Allah, and science, the deeds of Allah are not in major conflicts in defining the start of human life. The Holy Qur'ān provides an elegant description of origin, developmental stages of intra-uterine life. The Hadith explains two positions one that believes human embryo get ensouled at conception and the other after 40 days of conception. The paper aims to find that Islam confers moral respect to human embryo, but it also clarifies the absence of full human rights to a developing foetus. In Islam, human embryonic use is probably permissible for therapeutic and reproductive purpose keeping intact the principles of Shari'ah.