And We have enjoined upon man to do good to his parents. His mother carried him with difficulty and delivered him with difficulty. Surah Ahqaaf, Ayat 15 Then the labour pains brought her to the trunk of a palm-tree. She said “O that I would have died before this, and would have been something gone, forgotten.” Surah Maryam, ayat 23 If you ever see a woman in labour pains, I'm sure you will understand why Jannat is at the mother's feet. Even the strongest heart can't witness it. This is one reason that comes to mind. Rest Allah knows best. I hope you don't ask this next: Why don't men go through labour pains.