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              London: Women bosses 
              become "ruthless" and far more competitive at the peak of their 
              fertility during a month, and hence were less likely to give 
              attractive women a pay rise, says a study by US experts.
 This attitude dates back to the hunter-gatherer days when a woman 
              had to look after herself and withhold as much as possible from 
              rivals in order to attract men, the Daily Mail reported.
 
 Women bosses at their fertility peak could offer up to 25 percent 
              less pay to their female counterparts, according to psychologists 
              at Wellesley College in the US.
 
 Psychology professor Margery Lucas said women need to consider 
              their timing as well as how attractive their bosses are before 
              negotiating any deal.
 
 During the study, women had to offer a certain salary to an 
              on-screen virtual partner, and keep the rest for herself.
 
 At the end of the test, they rated the partner's attractiveness on 
              a 10-point scale, the daily said.
 
 Scientists said the results showed that on average women in the 
              fertile stage of the month offered 25 percent less to the most 
              attractive women compared to the least attractive women.
 
 Women at the low-fertility stage were far more generous, offering 
              20 percent more to the prettiest women than they did to the least 
              good looking.
 
 The researchers said it suggests that women at the low-fertility 
              stage are less threatened by beautiful female co-workers.
 
 "Among women, competitiveness during periods of high fertility is 
              linked to the withholding of resources from potential rivals. 
              Resource competition is important because women need to acquire 
              products - clothing, makeup, accessories, and so on - to enhance 
              their attractiveness," the lead expert said.
 
 "By offering less to attractive women and keeping more for 
              themselves, fertile women can help to enhance their own appearance 
              and weaken a competitor's ability to do the same," she said.
 
 "Women today should be aware that in, for example, salary 
              negotiations, menstrual cycle phase, along with the attractiveness 
              and sex of the negotiation partner, could interact in complex and 
              potentially costly ways," she was quoted as saying.
 
              
 
 
 
 
 
 
 
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