Antivaxxers have been claiming that vaccines cause female infertility for as long as I can remember. So it's not surprising that they are now claiming that COVID-19 vaccines will cause miscarriages or even make women infertile. Their assertion is based on a highly speculative and incredibly unlikely immunologic mechanism. Same as it ever was.
Crank “scientific” conferences: A parody of science-based medicine that can deceive even reputable scientists and institutions
Quacks crave respectability. To try to gain it, they often don the trappings of real medicine, such as holding medical conferences. To the uninitiated, such conferences can even look respectable. They aren't.