Earlier quoted context omitted.
From a throwaway because of the potential backlash...This paper is pure bull. They did a survey of 30k people and asked them about their experience and then said that the vaccine didn't cause anything and that we should trust our institutions. They didn't even have a control (unvaccinated) group! Just 30k vaccinated folks who responded to a survey about whether they perceived more/less bleeding, and such. I'm actuall…
How bad is it for health? This paper also notes that the virus itself is of great concern foremost, so any conclusion must be in comparison to the alternative (aka the control group): “Studies and anecdotal reports are already demonstrating that menstrual function may be disrupted long term [by the virus], particularly in those with long COVID (32–35)” It seems so many commenters here miss that sentence, and live in…
Also consider that it wasn't until the late 90's that the flu vaccine was approved for pregnant women and they were still worried about it. So we have the original adverse event studies post flu vaccine and compare them to post covid vaccine.
You are right, there are lots of confounds and interactions, we are careful to handle that properly. We're a bunch of nerds who don't have a dog in the political fight, we just want to show the data.