I think it might be an old wives tale.

My FIL actually took the wheels off MIL's car when she hit 7 months pregnant so that she couldnt drive.

I am now just over 7 months and had an altercation where a "L" Plater reversed into the front of my car on the weekend while i was in the car.

FIL suggested to DH that maybe he should do the same to my car now that i am at "that" stage of my pregnancy.

I think its a load of bull....