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Christopher Brunet's avatar

there goes my retirement plan

i was told unvaccinated sperm was the next bitcoin

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Julia D.'s avatar

Since many other factors have influenced annual fertility data, I think the stronger response to this concern is to explain the medical logic that accounts for the symptoms such as longer menstrual cycle without cause for long-term worry.

Any major stressor can cause your body to say "nope, let's not get pregnant right now" and trip up your cycle. Such stressors can include vaccination, infection, strenuous exercise (I once had a weird month after a lengthy backpacking trip), etc. This is common and temporary.

Here's a great post on this, with the best parts excerpted below.

https://medium.com/microbial-instincts/menstrual-disruptions-after-covid-19-vaccines-what-the-literature-says-8d30044b50dd

"'Vaccine hesitancy among young women is largely driven by false claims that covid-19 vaccines could harm their chances of future pregnancy. Failing to thoroughly investigate reports of menstrual changes after vaccination is likely to fuel these fears.'"

"In fact, the Covid-19 vaccine clinical trials did not even examine symptoms of menstrual changes, a typical pattern across trials."

"'It is biologically plausible that vaccines can affect menstrual cycles through short term disruptions to the immune system,' Gemma C. Sharp, Ph.D., a molecular epidemiology lecturer at the University of Bristol, agreed. 'Short-lived changes to the menstrual cycle are part of the body’s normal response to things like stress and immune disruptions.'"

"The MHRA also reported that the post-vaccine menstrual disorders are temporary, and symptoms include a sudden heavy period, delayed period, or abnormal vaginal bleeding."

Short-term "post-vaccine menstrual disorders are not unique to any given vaccine. It has been noted following Pfizer’s mRNA, Moderna’s mRNA, AstraZeneca’s DNA, and Johnson & Johnson’s DNA vaccines against Covid-19, as well as the human papillomavirus vaccines (more on this later)."

"People on hormonal contraception were more likely to report changes in menstrual flow following vaccination."

"Menstrual disorders can also happen following an infection. Dr. Male cited a study finding that 25% and 28% of women of childbearing age with Covid-19 (n = 237) had changes in menstrual volume and cycle, respectively.

"So, [short-term] menstrual changes can occur after vaccination or infection, suggesting that immune reactions to a stimulus are the likely driver. Once the immune reactions subside, the menstrual changes should subside too."

"We know that vaccines are generally unrelated to [long-term] menstrual disorders, except HPV vaccines. But even the link between HPV vaccines and [long-term] menstrual disorders is inconsistent."

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