30%-1% depending on the week and age, most women in the trials were in their 20's or early 30's I think, and out of the 127 women that were less than 20 weeks pregnant, I doubt more than less than 25% of the 127 women were less than 5 weeks pregnant, so you could do some weight calculations and guesses to see how much worse the vaccine is for women in early pregnancy.

https://www.shortform.com/blog/chance-of-miscarriage-by-week-full-chart/