As someone who was trying to conceive while the vaccine rolled out, this isn’t surprising. People were regularly reporting basal temperature spikes, delayed ovulation, and delayed periods. This is a community that is extremely data-oriented, since with the right measurements you’re able to predict your fertile (or non-fertile) window. I was disappointed to see how little research there was into menstruation at the ti…
My informed guess would be that the nanoparticles combine with HDL/LDL in the blood stream, and end up in the cells that consume these, but this is speculation.
This would end up disrupting the ovarian endocrine cells (cholesterol is the chemical precursor of sex hormones), which can regenerate once the RNA and its product has been eliminated. The future egg cells should not be affected (and AFAIK the ovarian reserve is not damaged by the COVID vaccines), and neither is sperm production.