I (and several others it seems) failed to take into account the short 2.5 month period during which the data were collected for this study. That means that women vaccinated in their first or second trimester did not have enough time elapse to complete a full term pregnancy. The early miscarriages were logged, but because the study only looked at completed pregnancy outcomes, no full-term births for those inoculated early in pregnancy had time to occur.
So the miscarriage rate, compared to the rate of normal births, cannot be calculated from these data.
But 4 months have elapsed since the data collection ended. Do CDC has 4 more months of data, and the necessary calculations could be made now or in the near future.
Please excuse my error.