What Does the Hadith Say About Biology?

Narrated Sahl bin Sa'd: I witnessed the case of Lian (the case of a man who charged his wife for committing illegal sexual intercourse when I was fifteen years old. The Prophet ordered that they be divorced, and the husband said, "If I kept her, I would be a liar." I remember that Az-Zubair also said, "(It was said) that if that woman brought forth the child with such-and-such description, her husband would prove truthful, but if she brought it with such-and-such description looking like a Wahra (a red insect), he would prove untruthful." I heard Az-Zubair also saying, "Finally she gave birth to a child of description which her husband disliked .

Narrated Anas: 'Abdullah bin Salam heard the news of the arrival of Allah's Apostle (at Medina) while he was on a farm collecting its fruits. So he came to the Prophet and said, "I will ask you about three things which nobody knows unless he be a prophet. Firstly, what is the first portent of the Hour? What is the first meal of the people of Paradise? And what makes a baby look like its father or mother?'. The Prophet said, "Just now Gabriel has informed me about that." 'Abdullah said, "Gabriel?" The Prophet said, "Yes." 'Abdullah said, "He, among the angels is the enemy of the Jews." On that the Prophet recited this Holy Verse:-- "Whoever is an enemy to Gabriel (let him die in his fury!) for he has brought it (i.e. Qur'an) down to your heart by Allah's permission." (2.97) Then he added, "As for the first portent of the Hour, it will be a fire that will collect the people from the East to West. And as for the first meal of the people of Paradise, it will be the caudite (i.e. extra) lobe of the fish liver. And if a man's discharge proceeded that of the woman, then the child resembles the father, and if the woman's discharge proceeded that of the man, then the child resembles the mother." On hearing that, 'Abdullah said, "I testify that None has the right to be worshipped but Allah, and that you are the Apostle of Allah, O, Allah's Apostle; the Jews are liars, and if they should come to know that I have embraced Islam, they would accuse me of being a liar." In the meantime some Jews came (to the Prophet) and he asked them, "What is 'Abdullah's status amongst you?" They replied, "He is the best amongst us, and he is our chief and the son of our chief." The Prophet said, "What would you think if 'Abdullah bin Salam embraced Islam?" They replied, "May Allah protect him from this!" Then 'Abdullah came out and said, "I testify that None has the right to be worshipped but Allah and that Muhammad is the Apostle of Allah." The Jews then said, "Abdullah is the worst of us and the son of the worst of us," and disparaged him. On that 'Abdullah said, "O Allah's Apostle! This is what I was afraid of!"

Narrated 'Abdullah bin Mas'ud: Allah's Apostle the true and truly inspired, narrated to us, "The creation of everyone of you starts with the process of collecting the material for his body within forty days and forty nights in the womb of his mother. Then he becomes a clot of thick blood for a similar period (40 days) and then he becomes like a piece of flesh for a similar period. Then an angel is sent to him (by Allah) and the angel is allowed (ordered) to write four things; his livelihood, his (date of) death, his deeds, and whether he will be a wretched one or a blessed one (in the Hereafter) and then the soul is breathed into him. So one of you may do (good) deeds characteristic of the people of Paradise so much that there is nothing except a cubit between him and Paradise but then what has been written for him decides his behavior and he starts doing (evil) deeds characteristic of the people of Hell (Fire) and (ultimately) enters Hell (Fire); and one of you may do (evil) deeds characteristic of the people of Hell (Fire) so much so that there is nothing except a cubit between him and Hell (Fire), then what has been written for him decides his behavior and he starts doing (good) deeds characteristic of the people of Paradise and ultimately) enters Paradise." (See Hadith No. 430, Vol. 4)

Fatima bint Abi Hubaish came to the Prophet and said, "O Allah's Apostle I get persistent bleeding from the uterus and do not become clean. Shall I give up my prayers?" Allah's Apostle replied, "No, because it is from a blood vessel and not the menses. So when your real menses begins give up your prayers and when it has finished wash off the blood (take a bath) and offer your prayers." Hisham (the sub narrator) narrated that his father had also said, (the Prophet told her): "Perform ablution for every prayer till the time of the next period comes."

Narrated Abu Huraira: A man came to the Prophet and said, "O Allah's Apostle! A black child has been born for me." The Prophet asked him, "Have you got camels?" The man said, "Yes." The Prophet asked him, "What color are they?" The man replied, "Red." The Prophet said, "Is there a grey one among them?' The man replied, "Yes." The Prophet said, "Whence comes that?" He said, "May be it is because of heredity." The Prophet said, "May be your latest son has this color because of heredity."