While we know she got sprayed and probably kicked (which could be bad enough in and of itself), I'm very dubious of her claims of a miscarriage.
First thing that raises my eyebrows is that she says the pepper spray was a significant factor in causing the miscarriage, in one source I've seen she says the doctor told her that the pepper spray "got to the fetus". What does that even mean, and how does that even happen?
Second thing is that all we have is her word that she was actually pregnant and actually had a miscarriage. She has yet to provide any confirmation of that, and hasn't filed a complaint against the police.
Third is that it seems that she may have been arrested about 9 weeks prior to this event. In that police report, it says she claimed she was 3 months pregnant (so that would make her 5, not 3, months pregnant when the Occupy protest happened) and she started holding her stomach and screamed "it hurt", and was then taken to the hospital.
Granted, it's not entirely clear whether it's actually her in that report, but I'm gonna hold off on the "[bless and do not curse][bless and do not curse][bless and do not curse] the police killed a baby!" bandwagon until we get something other than her word.
Pregnant Woman Blasted with Pepper Spray by SPD Says She Miscarried (Updated) | Slog