Do COVID-19 vaccines affect your menstrual cycle?

Women who received COVID-19 vaccines had a less than one-day increase in the length of their menstrual cycles around the time of their doses. The findings suggest that women may have a slightly longer menstrual cycle after COVID-19 vaccination, but the change is temporary and within the range of normal variation.
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Can COVID-19 vaccine delay my period?


A US study of 4,000 people found that receiving the first vaccine dose had no impact on the timing of the next menstrual bleed. But after receiving the second, people experienced a small delay – just under half a day on average.

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Why can my period be different after the COVID-19 vaccine?


The lining of the uterus — called the endometrium, which sheds each month — has also been linked to the immune system. It's possible that the vaccine or its effect on the immune system and/or hormones is somehow affecting the endometrium, leading to period irregularities.

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What are some of the side effects of the COVID-19 vaccine in women?


COVID-19 vaccines can cause swelling in your lymph nodes or arm. Women who have been vaccinated against COVID-19 can develop enlarged underarm lymph nodes on the same side where they had the shot. It's more common for this to happen after boosters and additional doses.

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What are the some of the common side effects of the COVID-19 vaccine?


Pain, redness, or swelling where the injection was given; headache; muscle or COVID-19 Vaccine joint pain; fever of 100.4°F (38°C) or higher; chills; upset stomach, throwing up, or diarrhea; swollen or tender glands; or feeling tired or unwell. Most side effects have been mild.

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Can the COVID-19 vaccine affect a woman’s menstrual cycle?



What are the common side effects of the Pfizer-BioNTech COVID-19 vaccine?


Commonly reported side effects in the clinical trial included injection site pain (sore arm), redness and swelling, fatigue, headache, muscle and/or joint pain, chills, fever, swollen lymph nodes, nausea and decreased appetite.

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What are the common side effects of the Moderna COVID-19 booster vaccine?


The most commonly reported side effects by individuals who received a booster dose of the Moderna COVID-19 Vaccine after completion of a two-dose primary series were pain, redness and swelling at the injection site, as well as fatigue, headache, muscle or joint pain and chills.

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Is it safe for women to take the Moderna or Pfizer COVID-19 vaccine?


The Centers for Disease Control and Prevention (CDC) recommend most adult women receive a two-shot primary series of either the Pfizer-BioNTech or Moderna mRNA COVID-19 vaccines, followed by a booster dose at least five months after the last primary dose.

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Does having fever, body pain, and swollen lymph nodes after the COVID-19 vaccine mean I am sick?

These symptoms do not mean you are sick. They signal that your immune system is responding to the shot and building up protection against the coronavirus.

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Is it normal to feel sick after getting the COVID-19 vaccine?

It is normal to feel sick after getting a COVID-19 vaccine.
You may have a sore arm.
Put a cool, wet cloth on your sore arm.

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Can I get pregnant after receiving the COVID-19 vaccine?

Many people have become pregnant after receiving a COVID-19 vaccine, including some who got vaccinated during COVID-19 vaccine clinical trials.
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What are some of the potential long-term effects of COVID-19?


Known as post-acute sequelae of SARS-CoV-2 infection (PASC), or more commonly as Long COVID, these conditions affect all ages. Long-term effects include fatigue, shortness of breath, difficulty concentrating, sleep disorders, fevers, anxiety and depression.

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Is it normal for lymph nodes to swell after receiving the COVID-19 vaccine?

“It's completely normal. It's your immune system reacting to the vaccine, as it should.”

The enlarged lymph nodes may feel like a lump and be a little tender, or you may not notice them at all, Dr.Roy adds.

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Can COVID-19 vaccine cause enlarged lymph nodes?

A COVID-19 vaccine can cause enlarged lymph nodes in your armpit or near your collarbone on the side of your body where you received the injection.
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Should I go to work if I have fever after a vaccination against COVID-19?

Employees with fever should, ideally, be excluded from work pending further evaluation, including consideration for COVID-19 testing. If an infection is not suspected or confirmed as the source of their fever, they may return to work when they feel well enough.
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What is the best vaccine for COVID-19?


In most situations, mRNA COVID-19 vaccines (Pfizer-BioNTech or Moderna) are preferred over the J&J/Janssen COVID-19 vaccine for primary and booster vaccination due to the risk of serious adverse events.

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Is it safe to take the Johnson and Johnson COVID-19 vaccine?


For many people, the benefits of the Johnson & Johnson vaccine outweigh the risks. It's effective at preventing severe illness, hospitalization, and death from COVID-19, and it's the only single-dose option available. However, you'll still need to get a booster shot 2 months later.

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Can I choose which COVID-19 vaccine I get?

Yes, depending on your age, you can choose which COVID-19 vaccine to get. For adults ages 18 years and older, the mRNA COVID-19 vaccines (Pfizer-BioNTech or Moderna) are preferred over Johnson & Johnson’s Janssen (J&J/Janssen) COVID-19 vaccine. You may get J&J/Janssen COVID-19 vaccine in some situations.

Currently, Pfizer-BioNTech COVID-19 vaccine is the only COVID-19 vaccine available to children ages 5 through 17 years old.

Learn more about your COVID-19 vaccination, including how to find a vaccination location, what to expect at your appointment, and more.

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Is it normal to have side effects after second COVID-19 vaccine?

Side effects after your second shot may be more intense than the ones you experienced after your first shot. These side effects are normal signs that your body is building protection and should go away within a few days.
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Is it normal that I feel tired after taking the Pfizer COVID-19 booster?


The most common AEs included pain at the injection site (23.5%), fatigue (9.7%), and malaise (7.2%) (Table 2). Most of the respondents (67.8%) reported that their general feeling after the booster was similar to the feeling after the second dose; 18.7% and 11.1% reported a milder or worse response, respectively.

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Is the Pfizer COVID-19 vaccine safe?


Pfizer-BioNTech COVID-19 Vaccine Ingredients. All COVID-19 vaccine ingredients are safe. Nearly all of the ingredients in COVID-19 vaccines are ingredients found in many foods – fats, sugars, and salts. The Pfizer-BioNTech COVID-19 vaccine (COMIRNATY) also contains a harmless piece of messenger RNA (mRNA).

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How long does it take for swollen lymph nodes to go down after the COVID-19 vaccine?

“Enlarged lymph nodes are visible as early as one day after vaccination, and they can remain enlarged for a month or more,” says Dr. Desperito. (Keep in mind that while you may stop feeling a swollen lymph node, which can feel like a lump in your armpit, it may still be visible on a scan.)
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Is it normal for the Pfizer and Moderna vaccines to cause swelling in the armpit?

The swelling in the armpit was a recognized side effect in the large trials of the Moderna and Pfizer-BioNTech vaccines. According to The New York Times, in Moderna's study, "11.6% of patients reported swollen lymph nodes after the first dose, and 16% after the second dose.
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How do you know if you are allergic to the COVID-19 vaccine?

An immediate allergic reaction happens within 4 hours after getting vaccinated and could include symptoms such as hives, swelling, and wheezing (respiratory distress).
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How long do lingering symptoms last after COVID-19?


Symptoms. People with post-COVID conditions (or long COVID) may experience many symptoms. People with post-COVID conditions can have a wide range of symptoms that can last more than four weeks or even months after infection. Sometimes the symptoms can even go away or come back again.

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