A new scientific discovery:

 In a true authentic Hadith Allah’s Messenger, (PBUH), says,

“Not from all liquid (i.e. sexual discharge) a child is (created). And if Allah desires to create anything, none could (ever) prevent Him.”

[Narrated by Muslim (1438), and Ahmad (11456)]

 Modern science confirms that in a sexual intercourse the number of sperms ejected is more than 300,000,000. Each sperm has a head, a neck, and a tail. The sperms swim in a special liquid that provides them with nutrition and makes it easy for them to move. All of the three million sperms move towards the woman’s ovule, which is fertilized only by one single sperm. This is because

“Not from all liquid (i.e. sexual discharge) a child is (created).”,

as Allah’s Messenger, (PBUH), confirms. But how did Allah’s Messenger, (PBUH), know that?! Which medical laboratory did he receive his knowledge from?! Which scientific study did he get this information from?! How did he get to know such fact ?!
Out of the 300,000,000 sperms that get to the ovule, only a few hundreds of sperms are chosen; and out of these sperms only one is chosen to fertilize the ovule.
But how does the chosen sperm enter the ovule?! That is really miraculous! When the sperm reaches, and collides with, the ovule, the membrane on top of the sperm’s head is torn and a noble substance comes out, making an opening in the outer wall of the ovule and allowing the sperm to get therein. As soon as the sperm gets into the ovule, the opening is closed again.
The ovule is a cell, and so is the sperm. They are both cells that have a nucleus, plasma and a membrane. In the nucleus of either one are millions of genes that are divinely programmed and activated.
Each piece of information is divinely activated at a certain divinely programmed time. At a certain time, a young man’s voice becomes rough and manly, due to a certain gene that has been activated. At a certain time, a beard begins to grow on the cheeks of a young man due to another gene that has been activated. The same thing happens to a young woman’s breast when another feminine gene is activated at a certain definite time.

“Verily, We have created man from Nutfah drops of mixed semen (discharge of man and woman), in order to try him, so We made him hearer, seer.”

[Al-Insan, 2]

There are several million pieces of information recorded in the nucleus of a sperm and an ovule.
When the ovule is fertilized by the sperm, it splits into ten thousand parts while it is on its way to the mother’s womb, where it settles down and becomes a human being. The branch of knowledge that deals with these facts is called embryology, the details of which cannot be studied in days, weeks or months. However, Allah, All-Mighty, says,

“Does man think that he will be left Suda [neglected without being punished or rewarded for the obligatory duties enjoined by his Lord (Allah) on him]?”

[Al-Qiyama, 36]

 Could man be left without reckoning, could he take other people’s property and oppress them and be free of punishment?
 Allah the Almighty says:

“Does man think that he will be left Suda [neglected without being punished or rewarded for the obligatory duties enjoined by his Lord (Allah) on him]? Was he not a Nutfah (mixed male and female discharge of semen) poured forth? Then he became an 'Alaqa (a clot); then (Allah) shaped and fashioned (him) in due proportion. And made him in two sexes, male and female.Is not He (Allah Who does that), Able to give life to the dead? (Yes! He is Able to do all things).”

[Al-Qiyamah, 36-40]

Play contradicts with the unity of universe:

"Did you think that We had created you in play (without any purpose), and that you would not be brought back to Us?" So Exalted be Allah, the True King, La ilaha illa Huwa (none has the right to be worshipped but He), the Lord of the Supreme Throne!”

[Al-Mu’minum, 115-116]

 Is it possible to be created with no purpose, no legislation, and no discipline?

“So Exalted be Allah, the True King, La ilaha illa Huwa (none has the right to be worshipped but He), the Lord of the Supreme Throne!”