Please can someone explain the risks of lifting things whilst pregnant... How heavy is too heavy? I'm not sure how this compares to other no no's like caffeine, deli meats etc. which I continue to indulge in from time to time. I thought DH was just being over protective by not letting me lift, but seeing family's reaction when I went to lift my suitcase the other day made me think it might be more serious than I thought.

So... where is the line? Should I not be picking up my 2yo niece anymore? What about groceries? Is the risk to my baby or just me?