" Many stages of a baby's
development in the mother's
womb are related in
the Qur'an. As described in
Surat al-Muminun 14, the
cartilage of the embryo in
the mother's womb ossifies
first. Then these bones
are covered with muscle
cells. Allah describes this
development with the
verse: "… [We then]
formed the lump into
bones and clothed the
bones in flesh. "

― Harun Yahya , Allah's Miracles in the Qur'an