here is one notable excerpt...
“I have not admitted a single vaccinated patient to the ICU. Every one has been unvaccinated,” Hughes said. “Of course, we worry as boosters wane.” There is no research evidence on whether the protection conferred by coronavirus shots lasts as long for pregnant people as it does for others."...
btw, IMO the use of the term Pregnant "People" is a step toward 'normalizing' the fact that some of "US" who have the physical anatomy of a male...truly see themselves as female...until you are willing to open your mind to what's going on in "PEOPLE'S BRAINS", you'll forever be willfully uneducated about that topic...it's not hard...won't hurt you...just read.
Edit: I"ve linked what I believe to be the article referred to by the OP...
Link: https://www.washingtonpost.com/health/2022/03/31/pregnancy-covid-risk/