There are five unseen things in the Qur’an that challenge all human beings .

The future is from the unseen, and no one knows the unseen except Allah  Almighty, and man should not occupy himself

With these matters and with us, the Prophet Muhammad, may Allah  bless him and grant him peace, says (the keys to the unseen are five that only God knows)...but knowing the unseen does not mean that one expects certain results based on his experience.

Know what will happen in the future

No one knows what he himself or others will gain in the future in terms of knowledge, work, or money, and everything that is claimed of that is a lie and slander

There is...a story

There was a sleeping man who dreamed that the Angel of Death had come to him, so the man asked the Angel of Death

So I told him how much life do I have left?

He replied and pointed to him with the palm of his hand, meaning five, and he woke up from his sleep, confused and worried

He wanted to know when he would die?

  Whether it is five years, five months, five weeks, or five days

He became confused

So he went to one of the men, Ibn Sirin, an interpreter of dreams in his time, and said to him, “What did you see in your dream?”

I said: The Angel of Death came to me in my dream, so I asked him and said to him, “O Angel of Death, how many lives do I have left?” He pointed to me with the palm of his hand, meaning five, and I did not know what he meant? Five years, five months, five weeks, or five days?

The scholar Ibn Sirin said to him!!!

The Angel of Death tells you that this question is among five questions that only Allah  knows.

- Allah  challenged the entire world in the Qur’an with five unseen times ----

 (33) Lo! Allah! With Him is knowledge of the Hour. He sendeth down the rain, and knoweth that which is in the wombs. No soul knoweth what it will earn to-morrow, and no soul knoweth in what land it will die. Lo! Allah is Knower, Aware. (34)  Surah Luqman

We quote very briefly the words of God Almighty
  (   and knoweth that which is in the wombs. ) 

The human comes

To say that the meaning of “And He knows what is in the wombs” is that Allah  knows whether the child in the womb of his mother is male or female.

If it is mentioned in the science activity that they can, in some way, through the ultrasound device, know before the birth of the baby whether it is male or female.

-- Some people say that (And He knows what is in the wombs) has departed from the five unseen things that Allah  Almighty has limited His knowledge to in order to challenge all of humanity.

And here the debate begins --- the question that should have been directed to someone who said such a statement is:

Who told you that knowing the sex of the fetus if it is male or female

The noble verse (And He knows what is in the wombs) means who limited the word (what) to male or female only, but it is absolute in general.

But look at the meaning of (what) and you will find it much more than that

-- Male or female, one fact. -- Long or short, another fact. -- Brown, white, or blond, a third fact.

-- Happy or naughty, a fourth fact -- Smart or stupid, a fifth fact -- And how long will he live?

-- What is his age, a sixth fact? -- Sick or healthy, a seventh fact

I can go into hundreds and even thousands of facts that 

Allah Almighty   expressed with the word (what).

Allah Almighty said: (  Lo! Allah! With Him is knowledge of the Hour.  )  Surah Luqman

Here, ِAllah  Almighty did not inform any human being of the timing of the Day of Resurrection 

Allah Almighty said: 

( They ask thee of the (destined) Hour, when will it come to port. Say: Knowledge thereof is with my Lord only. He alone will manifest it at its proper time.) Surah Al-Ara 

Allah Almighty said:  

  (  He sendeth down the rain, )  

He ( Almighty )  knows when the rain will fall

The knowledge of rain descending is something that ِAllah  has chosen specifically for. What weather and meteorological experts report is based on the expectation that it will happen, not the assertion that it will happen

Allah Almighty said:   (No soul knoweth what it will earn to-morrow,  ) 

No matter how much a person reaches the level of knowledge and thought, he cannot know how much money he will profit or obtain. 

Allah Almighty said: ( and no soul knoweth in what land it will die.  )  

That no one knows the time or place of his death or the death of anyone else, this is something that God has monopolized and withheld knowledge of from all of His creation.

 Lo! Allah is Knower, Aware. (34)  Surah Luqman