Can whooping cough vaccine affect my unborn baby?

No: This medication falls into category c which is reserved for meds that have no demonstrated effect on the unborn human fetus but not enough studies have been done to put it in a milder classification. Some practitioners prefer to wait until the second trimester or later for use out of an extra sense of caution. You have good protection developed & transferred some to baby when given before birth.

In a Positive Way: Other than perhaps transfering some passive immunity, there are no known negative fetal effects.