What other summaries' can be made.

1. Over time, people have decreased in size, that now the human body has adapted to being barren, this consequence would have derived from slow progressive changes', and being barren or having low sperm count is more prevalent in todays generations', that half the world are finding themselves'. either having babies young and dying young, or not having any babies at all.

Having babies young would be a direct consequence of short life syndrome.