If they've made it to the third trimester they're much more likely to have a successful birth, vaccinated or not.
80% of all miscarriages happen in the first trimester.
Is this on top of the roughly 66% spontaneously aborted of all conceptuses? (As per Soupart, a dear friend)
"80% of all miscarriages happen in the first trimester."
American College of Obstetricians and Gynecologists
Sorry to rain on the anti-vax parade. Given the small sample size (104 pregnancies), this is well within the margin of error. In other words, this is the normal, expected amount. The background rate. No difference observed with the vaccine.
What does the ACOG have to say about the vaccine data with pregnancy?
"no differences have been seen when comparing pregnant women participating in the v-safe pregnancy registry with the background rates of adverse pregnancy outcomes." -American College of Obstetricians and Gynecologists