Vaccine and periods?

[squiddybear]

Hi, I had my first vaccine 2 weeks ago (Pfizer). I was due on Wednesday this week and so far nothing has arrived! I've taken a pregnancy test just in case and it is negative.

I wouldn't say I was a clockwork person and my cycle has always been between 36 and 40 days (ever since my periods started). Could this be a cause of the vaccine? Am I just overthinking.

I was supposed to ovulate around the time the vaccine was given but actually started much later...

I'm a little worried (I'm a worrier!)

Has anyone experienced the same?

No the opposite had Oxford and now second period two weeks after last.

Yes. I got Pfizer little over two weeks ago and now periods are late.

I got the AZ one over a week ago and period has come in on time

If you know you ovulated later your period will also be later by the number of days later you ovulated. Hasn't affected my cycle at all.

No.

Interesting. Mine was 5 days late this month (2w post 2nd pfizer shot) but I put it down to age. I had 2 in Feb (normal period, then 4 days later a bonus one) so no clue what I was expecting in March!

No change for my cycle following Pfizer.

Yes I'm sure I remember a previous thread on this maybe a month or so ago. With Pfizer a number of people were reporting up to two week delays to their periods.

I had the Astra jab and am now a week late and very regular. Who knows !

Yes, 3 weeks since Pfizer and now 2 weeks late with no period in sight.

Seems most of us are having similar experiences! Will see what next week brings!

coronavirus-yellowcard.mhra.gov.uk/

Maybe we should all be reporting these late periods?

I wonder if people in the trials and last few months just assumed they were perimenopausal and it was underreported?

I spotted a bit two weeks after my Pfizer jab.
I hadn't had a period since last June.
It was a bit disappointing as I was very nearly at my year without. It's now reset 😩

Well there is still nothing this side. Did another pregnancy test just in case and it's negative!

No change for me. Had 2 pfizer now

No, aside from a conceived last month but had an early loss, this month normal cycle and period- sadly as I do want to be pregnant.

I had the vaccine immediately before ovulation (I'm TTC so tracking)

Please report these irregularities, it can not be coincidental it’s affected some of you in such a similar way.

Still waiting waiting.

Vaccine (az) on Saturday
Period on Monday , I was due anyway

You all need to report it via the yellow card above.

This is definitely a side effect they need to know about.

I reported it now.

If you're stressed your body delays ovulation. That may be why your periods are not on 'time' .

I’m 1 day late so far. Had Pfizer 25 days ago.

Yes I think it's probably stress too, combined with your immune system working hard, as it's so often the case when you're ill, your period changes. I don't think the vaccine could in any plausible biological way affect hormones etc directly (or fertility).
Mine came early, but shortly before the vaccine. So it could well be coincidental in many cases, and related more to the stresses of the pandemic and lockdown, as well as immune system working hard.

Just heard from a friend saying this exact thing. She is usually like a clock with her period but really late now, and not pregnant