For me, it's a little tricky to assess depopulation as a result of decline in birth rates. I certainly agree that the increased mortality statistics since 2020 are the direct result of the poison. That is because people don't control when they die (usually), and people generally want to live as long as they can. So any increase in mortality can be presumed to be involuntary and against what people want and try to achieve.
But with reproduction it's the opposite. Most people don't want children, or more than one maybe, and they do in fact control that

, so a decrease in live births can easily be interpreted as being largely a deliberate choice by most people rather than something happening to the population against people's will.
Not speaking about individual cases, but just general trends.
This raises another question, then, since there is definitely a large drop in live births, what is the cause? Yes, some of it may be attributable to the poison, and I definitely believe a lot of it is. But I think there is a large component of that figure that is voluntary, that people don't want to have children as a result of the disruption in society, the descending communism, the social disorder, the economic devastation, and so on.
Basically, I think the main reason behind the fall in birth rates is not so much the poison, as that people already didn't want children in general even before the crisis, but it seems clear to me that now there is a general awareness in the population that evil times are coming upon the world, and they don't want to bring children into it.