Dr. Joe Leigh Simpson is the Chairman of the Department of Obstetrics and Gynecology, Professor of Obstetrics and Gynecology, and Professor of Molecular and Human Genetics at the Baylor College of Medicine, Houston, Texas, USA. Formerly, he was Professor of Ob-Gyn and the Chairman of the Department of Ob-Gyn at the University of Tennessee, Memphis, Tennessee, USA. He was also the President of the American Fertility Society. He has received many awards, including the Association of Professors of Obstetrics and Gynecology Public Recognition Award in 1992. Professor Simpson studied the following two sayings of the Prophet Muhammad :
{In every one of you, all components of your creation are collected together in your mother’s womb by forty days...}2
{If forty-two nights have passed over the embryo, God sends an angel to it, who shapes it and creates its hearing, vision, skin, flesh, and bones....}3
He studied these two sayings of the Prophet Muhammad extensively, noting that the first forty days constitute a clearly distinguishable stage of embryo-genesis. He was particularly impressed by the absolute precision and accuracy of those sayings of the Prophet Muhammad . Then, during one conference, he gave the following opinion:
“So that the two hadeeths (the sayings of the Prophet Muhammad ) that have been noted provide us with a specific time table for the main embryological development before forty days. Again, the point has been made, I think, repeatedly by other speakers this morning: these hadeeths could not have been obtained on the basis of the scientific knowledge that was available [at] the time of their writing . . . . It follows, I think, that not only there is no conflict between genetics and religion but, in fact, religion can guide science by adding revelation to some of the traditional scientific approaches, that there exist statements in the Quran shown centuries later to be valid, which support knowledge in the Quran having been derived from God.” Footnotes:
2) Narrated in Saheeh Muslim, #2643, and Saheeh Al-Bukhari, #3208.Note: What is between these special brackets {...} in this guide is a translation of what the Prophet Muhammad said. Also note that this symbol # used in the footnotes, indicates the number of the hadeeth. A hadeeth is a reliably transmitted report by the Prophet Muhammad’s companions of what he said, did, or approved of.
(3) Narrated in Saheeh Muslim, #2645.
Note: Muslim and Bukhari are the most accurate for narration of messanger hadith.
Modified from: www.islam-guide.com