Think you know your flow? #5 will blow your mind.
Your Friday night “girl talk” is about to get a little more interesting.
Ever wonder why the female reproductive system is such a mystery? (And we’re not just talking about orgasms.) Women’s menstrual cycles are so subtly complex, scientists are still uncovering new and interesting findings about them.
From chocolate cravings to “synced periods” to what’s actually in period blood, here are five bizarre facts about your flow (we bet #5 will blow your mind!).
Craving chocolate? Yea, there’s a reason for that. During the luteal phase of the menstrual cycle, which occurs right before your period starts (a.k.a. PMS), your hormone levels fluctuate, which can lead to cravings and a rollercoaster of emotions. When it’s almost that time of the month, keep healthy(ish) snacks nearby, or try one of these non-food ways to curb cravings.
It’s OK to not get a period when you’re on birth control. While voluntarily suppressing your period may seem “unnatural,” there’s actually no medical reason not to skip it. During a normal cycle, the uterus lines itself to prepare for pregnancy, then sheds it (hello, period!). If you’re on hormonal birth control, however, you don’t build that lining, so your body has nothing to shed. The only time you actually need that lining is when you want a baby. Want to learn more about it? Here, an Ob-Gyn explains why it’s safe to skip your period while using BC.
“Synced periods” are myth (sorry). As much fun as it is to bond with your friends over periods that seem to start and end at the same time, it’s just a theory, and there’s not much scientific evidence supporting it.
Some of your furry friends have periods, too. Thought humans were the only animals with a menstrual cycle? Think again. Certain primates, bats, rodents, and dogs also bleed. These animals’ periods, however, are a little different than humans’. For instance, female dogs tend to only bleed when they’re in heat, once or twice a year.
Your menstrual blood contains more than 380 unique proteins—and more than 1,060 types of protein total. It’s also full of circulatory blood (the kind that’s in the rest of your body), cells, and vaginal secretions.
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Two studies of menstrual synchrony: Negative results. Columbia, MO: Department of Anthropology, University of Missouri, 2003. (Accessed on November 20, 2017 at http://www.sciencedirect.com/science/article/pii/030645309190021K)
Women Do Not Synchronize Their Menstrual Cycles. Davis, CA: Department of Psychology, University of California, Davis, 2006. (Accessed on November 20, 2017 at https://smartsite.ucdavis.edu/access/content/group/05df5a0c-16e3-4d15-8626-76c7c012163b/Readings/Yang-Schank2006.pdf)
Menstruation in short-tailed fruit bats. New York, NY: Department of Obstetrics and Gynecology, Cornell University Medical College, 1992. (Accessed on November 20, 2017 at https://www.ncbi.nlm.nih.gov/pubmed/1625240)
First evidence of a menstruating rodent: the spiny mouse. Clayton, Australia: Department of Obstetrics and Gynecology, Monash University, 2017. (Accessed on November 20, 2017 at https://www.ncbi.nlm.nih.gov/pubmed/27503621
Estrus Cycles in Dogs. Los Angeles, CA: VCA Animal Hospitals. (Accessed on November 20, 2017 at https://vcahospitals.com/know-your-pet/estrus-cycles-in-dogs
The menstrual cycle and body temperature in two gibbons (Hylobates lar). New York, NY: College of Physicians and Surgeons, Columbia University, 1941. (Accessed on November 20, 2017 at http://onlinelibrary.wiley.com/doi/10.1002/ar.1090790303/abstract)
Proteomic Analysis of Menstrual Blood. New York, NY: New York City Office of Chief Medical Examiner, 2012. (Accessed on November 20, 2017 at https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3494145/)
Menstrual Cycle. Washington, DC: Office on Women's Health, U.S. Department of Health and Human Services, 2017. (Accessed on November 20, 2017 at https://www.womenshealth.gov/menstrual-cycle