Covid-19 Vaccines and the Menstrual Cycle

The intelligence level of comments here is depressing.

I've already seen how the PR campaign will be ran with the news nonstop pushing vaccines with stories like... If I die from the vaccine I will be grateful to help save lives, or I had a bad reaction and nearly died but I would do it again to save lives. Remove immunity from the vaccine manufacturers already if they are so safe and you want more people to get vaccinated.

Shouldn't this kind of research have been carried out before billions of people were vaccinated? Is it ethical to enforce vaccinations (via mandate) with these matters unresolved?