Women Might Become More Fertile In 40s  

The trend for having children after 40s could lead to women becoming more fertile only after 40s as suggested by researchers at a British university.
As many women wait until they are older to give birth, only those with longer lasting fertility genes will be successful. That means the average length of fertility will grow as their genes will be passed on to their children.
The study from the University of Sheffield shows that previously women would marry early and if widowed were too old to remarry thus favouring early childbirth in women.
But today's reluctance to settle down and reproduce until later in life could lead to fertility beginning to favour older women.
The scientists studied marriage patterns to trace the survival and marriage histories of 1,591 women.
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