Friday, February 5, 2010

34. Pheromones


Women who live together may find that their menstural cycles synchronize, presumably due to pheromones (olfactory signals). This menstrual synchrony is generally accepted as real, though with many factors influencing menstrual timing, it may not be apparent for all groups of women living in proximity.

Now consider Mrs. H. who experienced a year without menses, which is the definition of menopause and totally expected for this 56-yr old. Then her daughter and family moved in with Mrs. H. and her husband. After a few months, Mrs. H's menses resumed, the timing synchronous with that of her daughter's menses. The daughter recently found a house to rent and may be moving out in a month or so. I'll be curious to see then what happens to Mrs. H's menses.

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