Though this article is wriiten as if cycling while being pregnant is a kind of positive things, I guess it's one of the most dangerous behavior. If you think about what the most dangerous transportation mode is, it would be understandable.
Needless to say, if she stumbles while cycling, it would impact the child in her belly.
She should have appealed how cycling is dangerous just before bearing child, and explained how important it is to build public transporations.