The first male humans had an incentive to seek fertile women as the means of spreading their genes.
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"In evolutionary terms, it makes sense for men to favour feminine fertile women - those that did would have had more babies, " she added.
The primeval object of "veneration" was the goddess with the power to call forth desire from men, and to make barren women fertile.
They suggest the hormone may act directly on reproductive tissues to make women more fertile in lighter months.
Dr Nettle suggests it is because short women become fertile earlier (the same hormonal processes that terminate growth are also responsible for sexual maturation).
Modern women are becoming fertile at a younger age thanks to improved diet.
Dr Laufer believes that identifying women with the genetic fingerprints that they have found would enable doctors to know which women are still fertile in advanced age and may determine the counseling they need.
Genetics largely determine which women will still be fertile at 40 and which ones won't.
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With or without campus jargon, the annoyingly unfair fact is that marriageable men tend to like women who are young, fertile and intellectually unthreatening.
As these women moved from their least to most fertile period, their closeness scores rose by a point.
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Incidentally, women also buy sexier clothes when they are most fertile.
Here were women unapologetic about being women: whole, incomplete, messy, divided, fertile, plump, merchant, slave, prostitute, servant, old, nubile, lost, found, owned, free.
As women mated to less sexually attractive men moved from their least fertile to most fertile period, their closeness scores dropped one point on a seven-point scale.
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In addition, women often send subtle (and subconscious) come-hither cues at the most fertile time of the month.
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