If you are in the USA and pregnant or recently pregnant, you will be offered a booster vaccine as soon as you are six months out from dose 2. And @acog recommends you get it. 2/
To answer this question, we recruited two cohorts.
Cohort 1 consists of 250 people recruited before they received their COVID vaccine, who are keeping a record of their periods before and after vaccination. 2/
This cohort will give us an idea of how common it is to experience a menstrual change after COVID vaccination.
But many of them are still tracking their cycles, so we still have to wait for all the data to come in! 3/
A bunch of people have been in touch about this paper. Has a review of the evidence really raised questions about the safety of the Pfizer #COVID19#vaccine in #pregnancy?
The paper purports to present a reanalysis of the V-safe pregnancy registry data to the end of February. You can find the original report (which concluded no increased risk of pregnancy complications following vaccination) here… 2/
But before we get into the details of what’s been done here…
There is no need to scry the six-month-old data from Shimabukuro! It was difficult to interpret because of the limited follow-up time, but *luckily* we now have longer follow-up data… 3/
The authors looked at user data entered from March - September 2019 (pre-pandemic) compared to March - September 2020 (Pandemic). They also asked users to rate their stress levels (retrospectively) in the pre-pandemic and pandemic periods. 2/
The average cycle length decreased from 29.4 to 29.q6 days, and the average period of menstruation increased from 4.21 to 4.23 days.
Neither of these changes is clinically significant. 3/