There were loads of studies of this kind - rats were impaired in running through mazes or died after exposure to menotoxin! A lot of different flowers died when exposed to menstrual blood! It was posited that menotoxin caused allergies, asthma, and gastrointestinal problems in OTHER PEOPLE!
This wasn't just some fringe stuff, it was fairly mainstream science that if you're menstruating you're just giving off a waft of invisible poison.
Also worth noting that Mr Menotoxin Discoverer himself, Béla Schick was a pretty good doctor in other respects and virtually eliminated diptheria in the USA.