Three Veils of Darkness

“HE makes you, in the wombs of your mothers, in stages, one after another, in three veils of darkness.”

[Al Qur’an 39:6]

According to Prof. Keith Moore, these three veils of darkness in the Qur’an refer to:
(i) interior abdominal wall of the mother,
(ii) the uterine wall,
(iii) the amnio-chorionic membrane.