This makes a lot of sense in a different area that I have been interested in.
It has been shown that in the case of having children with different men, a child who is in the womb of his own mother who had previously birthed from a different man is more likely to put stress on his mother by taking more nutrients in the umbilical cord and initiating vasoconstriction there by highering the blood pressure of his mother in order to have more nutrients filled blood.
Previously the reasoning behind why a child would hurt his own mother in the womb because of having siblings from a different father was puzzling. How would a child know that the uterine environment is different and why would any child hurt the mother who id half related to him? I truly think this study has explained this. The presence of foreign DNA from a different father is the likely explanation.
This is especially the case if the iddah period wasn't fulfilled, for widowed women the days are more, it's 4 months 10 days because the period of grief makes the cleanse take longer just as stress has a drastic impact on all other processes.
I was reading some study a long while ago from Israel were the women that is divorced it takes her 3 menstrual cycles to let go of the previous partner's imprint, the first cycle removes around 35%, the second 72% and the last around 99% according to the study.
It's remarkable that science has just began to catch up with this, there is great wisdom to all the commandments of Allah whom knows us best
[67:14]
Should He not know that which he has created? and He is the One that understands the finest mysteries (and) is well-acquainted (with them).
But again if your not a practising Muslim women especially those promiscuous western women, you could imagine how utterly filthy they would be, they don't even avoid it on their periods then wonder why cervical cancer is so high amongst them.
The Prophet said that the day of judgement will happen and the "Romans will be the majority on the earth" (Romans Europeans), keep in mind a wind will below before the horn is blown taking the soul of every believer and anyone with a mustered seed of 'Iman', hence only the most ardent wicked ones will remain of which they will make up the majority.