THE MENSTRUAL PERIOD
The menstrual period is when the unfertilised egg is expelled from
the body. Since fertilisation has not taken place, the walls of
the previously readied womb contract and the egg is expelled with
the breaking of tiny blood vessels. Following that, the body will
then begin preparations to repeat the whole process all over again.
All of these stages are repeated in all women over a specific period.
Every month, new egg cells form, the same hormones are secreted-again
and again at the same times. Thus the female body is prepared as
if it will be fertilised. However, in the final stage, the absence
or presence of the sperm changes the nature of the preparations
in the body.
During the period in question, the changes in the empty space in
the womb can only be identified by an anatomical or gynaecological
examination. Yet these changes, only recently identified by scientists,
are miraculously indicated in Surat ar-Ra'd:
Allah knows what every female bears and every
shrinking of the womb and every swelling. Everything has
its measure with Him. (Qur'an, 13:8)
At the beginning of the menstrual period, the mucous on the walls
of the womb (the endometrium layer) is 0.5 mm thick. Under the effect
of hormones secreted by the egg, this layer grows and reaches a
thickness of 5-6 mm. This layer is then discarded in the absence
of fertilisation. As we see from the above verse, this monthly increase
and reduction in the walls of the womb is indicated in the Qur'an.