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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
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Sex of the fetus isn't determined at conception, rather it happens after 40+ days .
check out
Human Embryo’s Sex determination: A Comparative Study of Quran, Hadith and Science
http://web.uob.edu.pk/uob/Journals/Balochistan-Review/data/BR%2002%202015/169-176%20Human%20Embryo%E2%80%99s%20Sex%20determination%20A%20Comparative%20Study%20of%20Quran,%20Hadith%20and%20Science,%20Nosheen%20Zaheer.pdf