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A  European study shows that contraceptive pills may blur a woman’s judgement and even impact her relationship by making it more difficult for her to identify more complex emotions.

The new small-scale study was carried out by researchers at the University of Rostock, University of Greifswald, and University of Potsdam, Germany in which the researchers recruited 95 healthy women, including 42 who took the pill and 53 who did not, and asked them to complete a special emotion recognition task.

The findings, published in the journal Frontiers in Neuroscience, showed that both groups of women were equally good at recognizing easy expressions and emotions, such as happiness and fear.

However, women who took the pill were nearly 10 per cent worse on average in recognizing the most complex emotional expressions, such as pride and contempt, than women who didn’t take the pill.

The effect held true for both positive and negative expressions, and regardless of the types of pills taken. The team also found that a woman’s menstrual cycle phase had no effect on the differences in emotion recognition.

“If oral contraceptives caused dramatic impairments in women’s emotion recognition, we would have probably noticed this in our everyday interactions with our partners,” said senior author Dr Alexander Lischke.

Lischke further said, “We assumed that these impairments would be very subtle, indicating that we had to test women’s emotion recognition with a task that was sensitive enough to detect such impairments. We, thus, used a very challenging emotion recognition task that required the recognition of complex emotional expressions from the eye region of faces”

Although the pill has been linked with a variety of physical effects, both good and bad, little is known about the psychological effects. However, Dr Lischke added that the findings are in line with previous research.

Coincidental findings suggest that oral contraceptives impair the ability to recognize emotional expressions of others, which could affect the way users initiate and maintain intimate relationships.

Cyclic variations of estrogen and progesterone levels are known to affect women’s emotion recognition, and influence activity and connections in associated brain regions.

Since oral contraceptives work by suppressing estrogen and progesterone levels, it makes sense that oral contraceptives also affect women’s emotion recognition; however, the exact mechanism underlying oral contraceptive-induced changes in women’s emotion recognition remains to be elucidated.

Further research is now needed to understand this area better says Dr. Lischke, and to help give women more detailed information about the potential effects of oral contraceptive use.

(Inputs from media reports)

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