The foetus is fully formed at the end of the sixth month. The womb then enters the incubation period. All the baby's bodily organs and systems develop fully during that time, and the womb accelerates this growth by providing nourishment for the foetus. This period continues until the baby emerges from the mother's womb.
The birth canal is normally very narrow and it is difficult for the foetus to pass through it. During birth, however, a number of physiological changes take place in the mother's body. These changes allow the foetus to move easily through the birth canal. Some of these changes include: the expansion of the joints in the pelvic bones in order to widen the birth canal, the relaxation of the muscles to further widen the canal and the lubrication of the canal with amniotic fluid.92 These pre-birth changes are described in one scientific source in these terms:
As birth approaches, the amniotic fluid embarks on those activities that will be necessary to facilitate that birth. This fluid comprises sacs, which will enlarge the mouth of the womb, thus allowing the womb to assume the dimensions to allow the baby to pass. These sacs also prevent the foetus from being crushed in the womb during birth. Furthermore, when the sacs burst and release their fluid at the commencement of birth, the path to be taken by the foetus is both lubricated and sterilised. In this way, birth takes place easier and in a manner naturally free of germs.93
This series of occurrences is openly indicated in the verse of the Qur'an, "Then He eases the way for him." (Qur'an, 80:20) However, it has been possible today to determine these physiological changes-which Allah informed us of 1,400 years ago-only with the use of a number of technological devices.