No, but it certainly seems to be the case that there were more adverse effects after the second one, for example the Myocarditis rates after the second one were higher than the first. (Supposedly.... I take all stats with a huge helping of distrust.)

I haven't seen any stats showing decreased birth rates in Ontario yet.

Note: I believe the stats don't matter when it comes to mandates. Ethically bodily autonomy means each person has the right to decide to take an injection or not, and medical procedures should never be forced, required, coerced, or discriminated against.