Hey! I was wondering, could the third dose of the Pfizer COVID-19 vaccine make Plan B less effective?

black teenager wearing protective mask against covid-19

Great question, thanks for asking! Over the last year and a half, we have learned a lot about the COVID-19 vaccines created by Johnson & Johnson, Pfizer, and Moderna. Every day, researchers learn something new about the vaccines, because in science things are constantly evolving! However, this leaves room for many people (who think they are scientists) to share their own theories and ideas, without fact checking, cough*social media*cough. Although this isn’t necessarily bad, it can make educated decisions more difficult to make. Why? Because sometimes it’s hard to differentiate between what’s real and what isn’t, especially on social media. Lucky for you, that is where we can help!

True or False:

The COVID-19 vaccine will affect my ability to get pregnant.

False, the COVID-19 vaccine will not affect you or your partner’s fertility (AKA the ability to become pregnant).

The COVID-19 vaccine will affect my use of Plan B.

False, the COVID-19 vaccine does not affect the use of Levonorgestrel (Plan B) or any hormonal contraceptive methods such as the pill, patch, shot, implant, etc.

The COVID-19 vaccine may affect my menstrual cycle.

True, researchers have noted that a very small number of women reported changes in their first menstrual cycle (mainly reports of 2 days longer) after they received the vaccine. However, it’s a very very small number and vaccine timing doesn’t need to be scheduled around your menstrual cycle!

As always, if you have questions about your health, speak with your health care provider (HCP), as they know you and your body best!