I want to preface this response by saying I am not anti-vaccine, and by no means is this meant to scare you into making a decision that isn't right for you. There is a case in Ontario where a doctor basically accused a woman of being a bad mother for turning down a flu shot at 4 months pregnant. She ended up getting the shot...and losing the baby 4 days later. She tried to sue the doctor, and she got someone from the states to give a statement saying that the drug companies have never even tested the flu shot on pregnant woman, because it's unethical! So there's no evidence to its safety. And for H1N1, the drug companies said they "didn't have time" to test it on pregnant women. So no one is saying it's not effective, just questioning the safety and all. I never got the flu shot when I was pregnant. BUT, every one of my mommy friends who got the H1N1 vaccine when they were pregnant had kids who were just fine.