I have heard it before but I also know personally of women who haven't had any or much MS and gone on to have healthy babies. I just think that in some cases, unfortunately it is a sign of things not going right. I think if you're not bleeding, it's all good. Just take it as it comes.

BTW I didn't have any sickness until around 6 to 7 weeks and then it hit with a vengeance. =)