The expression "a lump of chewed meat" is mentioned in the 5th verse of the chapter of al-Hajj as "a morsel of flesh, partly formed and partly unformed". Indeed, at this stage the embryo is perceptibly visible but so inappreciable in shape that it is impossible to comprehend its details and thus it is in complete compliance with the Qur’an’s expression, "a morsel of flesh, partly formed and partly unformed". For more detailed information, you can visit the websites below.
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Author: Windows of Islam