Period myths that “just need to die”
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Mar 29, 2025
Dr. Jen Gunter debunks the most common myths about menstruation.
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0:00
Humans don't have pheromones. It's never been proven. So there's no such thing as cycle syncing
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Another myth that I hear is the menstrual cycle is a way to release toxins from the body
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Well, if we needed the menstrual cycle to get rid of toxins, then I have bad news for women
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in menopause and all of men, right? Humans don't actually have toxins and the menstrual cycle
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doesn't remove things from our body in the same way that the liver and the kidneys do
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It's a myth that just needs to die. Historically, education about the menstrual cycle has been dismal
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It's all framed in context of pregnancy and preventing pregnancy, as opposed to about
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the menstrual cycle and what it means for a person's body. If we can't talk about it, if we can't share knowledge about it, then the implication is
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that it doesn't matter. But we know that the menstrual cycle has a significant impact on the half of the population
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that has it. We want people to know how much blood is too much, how much pain is a concern, has your
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period started too late. All these things are important to know about so you can advocate for yourself
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If you have a menstrual cycle, if you love someone who has a menstrual cycle, and I know
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that you came from someone who had a menstrual cycle, you should want everybody to be able
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to access the same level of care. Hi, my name is Dr. Jen Gunter
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I'm a San Francisco Bay Area OBGYN and author and health communicator
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And my latest book is Blood, the Science, Medicine, and Mythology of Menstruation
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Relatively few mammals menstruate. So there's humans and some great apes. There are some bats
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There is the spiny mouse and the elephant shrew. So it's kind of like this motley crew species
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Every other mammal has an estrus cycle, which is a little different
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The word menstruation comes from both a Latin and a Greek root, and it's for the word for monthlies or a monthly occurrence
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And so it reflects the idea that the menstrual period was expected to come about once a month, like the moon
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Many people have historically believed that the menstrual cycle was every 28 days
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There really is no scientific proof for that. It might be an average at some ages
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but there's actually quite a bit of variation, even cycle to cycle. So it could be very normal for you to have a 26 day cycle
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for one cycle, and then the next one it'd be 32 days. A menstrual cycle means that the lining of the uterus has undergone a change called decidualization So the beginning of the cycle starts actually with the first day of bleeding
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And for humans, that happens after ovulation occurs and is due to the release of progesterone
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Decidualization is a real physical change in the tissue. And if you want to think about the decidua as kind of like a catcher's mitt in the uterus
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it's all prepared and ready for an embryo. If there's no decidualization, implantation can't occur
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When you have an estrous cycle, the trigger comes from the embryo itself
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So you don't have to have that catcher's mitt waiting there. one ogy that i often use is with humans it's like the restaurant's making a dish whether or not
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you show up it's going to be made but with estrus it's only making the dish if it's been ordered
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humans have an incredibly invasive placenta that has to be handled or could grow through the uterus
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and cause problems. So humans have evolved to deal with that. In addition, the decidua actually
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senses embryo fitness and is part of regulating which pregnancies actually take and which are
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incredibly early miscarriages. So what happens when you don't get pregnant in a cycle is that
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you have this big thick tissue that's got nowhere to go. It can't be reabsorbed by the body and so
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menstruation involves chemical changes that cleave the decidua from the uterus, opening up
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blood vessels that then push that fluid out with the decidua, the tissue, and then the cycle can
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start anew. There is this romanticization about nature, that nature has everything perfect. And I
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think that nature's motto is probably best summed up as just good enough, right? You're half dressed
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didn't slap you around the back and push you out the door, just good enough, gone, gone out into the world
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Because evolution doesn't care about an individual person's suffering. It cares, is this design going to work enough to perpetuate the species
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I often think that this is another reason for everybody to know about menstruation
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because the pain and the problems associated with perpetuating the species have been uniquely borne by half the population
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There are a constellation of negative symptoms that can be associated with the menstrual cycle Premenstrual syndrome is a constellation of symptoms that happen only in the luteal phase so after ovulation and those can include breast tenderness
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moodiness, feeling of hopelessness or anhedonia, and food cravings, which are really very common
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People can also get menstrual diarrhea, which again happens at the same time
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either right before or during the menstrual cycle. There's also pain that can happen with ovulation, which is middle schmurts, which we believe is
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actually more related to muscle spasm that's triggered by the chemicals that are released
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with ovulation. Then there are menstrual cramps, and those can vary in significance from being mild
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to being incredibly severe. To put it in perspective, the amount of pressure generated
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when someone has menstrual cramps can be the same as the pressure generated in labor when you're
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pushing. And I'll add that some people have equated the pain and labor as equivalent to
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cutting a finger off without an anesthetic. We think that menstrual cramps exist as a part of
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the mechanism to stop bleeding. And among those chemicals that are produced are substances called
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prostaglandins. Prostaglandins trigger pain. They also trigger the uterus to contract. So you have all this chemical soup to stop the bleeding
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You have things that cause vasospasms that cause those blood vessels to contract down
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The uterus cramps down in the same way that you put pressure on a wound to stop bleeding
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Cramping itself is painful. The reduction in blood flow is painful. And some of the chemicals that are reduced can also affect pain thresholds
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One of the most common treatments for menstrual pain are taking non-steroidal anti-inflammatory
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drugs that we also call NSAIDs. And what these drugs do are they block prostaglandins. However
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when they don't help, that could be a sign there's something else causing your pain, like endometriosis. But also, for some people, they just don't work well
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and we don't really understand why that is. But that is an evidence-based approach to treating
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menstrual pain and taking medications that block prostaglandins. Prostaglandin seems like the troublemaker
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Yeah, prostaglandin is my old foe. But prostaglandins are important in our body in all different kinds of ways
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It's not just a menstrual cycle related chemical. But we do think as far as menstrual pain and menstrual diarrhea, that they are the big troublemakers
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People use apps for their menstrual cycle in a couple of different ways They may use them just as a tracker to see kind of what going on And they may also use them as part of a fertility awareness method There also a lot of talk on social media about
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athletes using their menstrual cycle to optimize performance. And none of that is really grounded
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in good science. There is no robust data there at all to support that. Now, it is true that if you're
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trying to optimize your physical fitness. There may be times of the month where, for example
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if your breasts hurt, you might not want to do upper body working, right? So you're listening
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to your body. Those are kind of intuitive. You don't need an app to tell you that
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One of the issues, especially with menstrual tracking apps, is many of them can be quite
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inaccurate. And there was a study where they looked at women who had tracked their cycles
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And what happened was when their period didn't come when the app predicted
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the women blamed their bodies as opposed to blaming the app for being incorrect with the prediction
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Meaning the app made you less informed about your body than more informed
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Also, there is a dark side of apps, whether you're using them to just track your cycle
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or if you're using them as part of a fertility awareness method. and that your data may not be secure
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And there is definitely a concern for people who live in areas
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where not only is abortion illegal, but people who have miscarriages are prosecuted as having abortions
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that this data could be abused. But I don't think it's a stretch that in some places
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this kind of data could lead to all kinds of problems down the road
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So people just need to be very mindful about where we're going
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Ignorance about the menstrual cycle is clearly very common, even amongst medical providers
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Weaponizing this ignorance is becoming law. And these are really troubling times
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This is when people need to actually know the facts so they can speak up
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because we are definitely seeing a shift towards viewing women solely as breeders
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and that your life has less value than your role as basically carrying a pregnancy
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I don't think we can sound enough alarms about that. Want to dive deeper
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