Hadith On Embryo

DAY 40: the embryo does not look human.
DAY 45: the embryo looks human.

So what happens in between these 5 days???

The Prophet ﷺ said 1400 years ago:

إِذَا مَرَّ بِالنُّطْفَةِ ثِنْتَانِ وَأَرْبَعُونَ لَيْلَةً بَعَثَ اللَّهُ إِلَيْهَا مَلَكًا فَصَوَّرَهَا وَخَلَقَ سَمْعَهَا وَبَصَرَهَا وَجِلْدَهَا وَلَحْمَهَا وَعِظَامَهَا
“When 42 NIGHTS PASS after the semen gets into the womb, God sends the angel AND GIVES HIM SHAPE. Then He creates his sense of hearing, sense of sight, his skin, his flesh, his bones.”

[“Sahih Muslim”, 6393].
https://sunnah.com/muslim/46/4