I have always thought that our Prophet pbuh &hf had only one daughter. But I heard on an online lecture that our Prophet pbuh & hf had 3 other biological daughters Zainab, umm Kulthum and Ruqqayah

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There is a disagreement historically

Many Shi’a ulema believe the Prophet had one biological daughter only and the rest were adopted daughters from Khadija’s sister

However some (minority) have argued otherwise

After some research I agree with opinion that states only one daughter