Did Fatimah bint Muhammad die naturally, or was she killed?

Question

Did Fatimah-Al-zahraa die naturally or was she killed?

Someone asked me such, and asked me why the holiness Fatimah peace be upon her passed away in just 90 days or less after her father:

how did she die...my friend said he died naturally but I said she died due to an accident behind the door? link

Answer 1

Sunni: Natural causes 6 months after Prophet's death. She was pregnant with a 3rd child.

Shia: Umar burned her house after she refused to give Bayat. I think this is a much later assertation because other Sahabah would have indicated something this magnanimous happened at some point in their lives. It's very weird that no Hadith, even daif, doesn't discuss something like this.

Answer 2

She was injured when defending her husband Imam Ali --peace be upon him-- at the time that Abu Bakr and Umar were trying to force Imam to give the pledge of allegiance to Abu Bakr, and she was later martyred from that injury that also immediately killed the embryo in her womb:

source: كتاب سليم بن قيس الهلالي، ج‏2، ص: 588

وَ قَدْ كَانَ قُنْفُذٌ ... ضَرَبَ فَاطِمَةَ ع بِالسَّوْطِ حِينَ حَالَتْ بَيْنَهُ وَ بَيْنَ زَوْجِهَا وَ أَرْسَلَ إِلَيْهِ عُمَرُ إِنْ حَالَتْ بَيْنَكَ وَ بَيْنَهُ فَاطِمَةُ فَاضْرِبْهَا فَأَلْجَأَهَا قُنْفُذٌ ... إِلَى عِضَادَةِ بَابِ بَيْتِهَا وَ دَفَعَهَا فَكَسَرَ ضِلْعَهَا مِنْ جَنْبِهَا فَأَلْقَتْ جَنِيناً مِنْ بَطْنِهَا فَلَمْ تَزَلْ صَاحِبَةَ فِرَاشٍ حَتَّى مَاتَتْ صَلَّى اللَّهُ عَلَيْهَا مِنْ ذَلِكَ شَهِيدَة