It’s not 30,000, they pulled their numbers in Table 4 from those who were in v-safe.
They tracked them for 1 year after the 1st jab, IIRC.
But they lost touch with around 3000 of those.
That’s a well-known problem in these kind of studies, it’s called “Lost to Follow-Up”.
So the results reported cannot be guaranteed to be representative of all the women who first entered the study; interpret the results with caution.
I completely agree with you that it is a problem they lost touch with a lot of the pregnant women.
It could be they miscarried and are too grief-stricken to even report that.
What is needed, however, is data on how typical this drop-off rate by comparing it to the number of pregnant women in other studies who drop out.
If the number here is higher than average, then this needs to be followed up on.
The data was collected on 30 March, 2021.
The registry enrolled 3958 participants with vaccination from December 14, 2020, to February 28, 2021
They were only tracked for 30 days to 106 days, depending on the day they enrolled. The last babies to be born will be in November, 2021. It appears that miscarriages are not a problem, but hopefully all will be born healthy. The first trimester vaccinations are clearly the ones to watch.