YES. The sad reality is that the conventional 3-point lap & shoulder belt was not designed for (or required to be tested for) it’s effects on pregnant women or their unborn child.
The standard seatbelt was made to secure the occupant in the car by engaging the hip bones, which is a huge problem for mother-to-be's.
During the start of the second trimester, your baby moves about and in front of your hip bones, directly beneath the seatbelt. So when you're in an accident, or even a sudden stop, the belt compresses with extreme speed and force, disturbing or even crushing your baby.
To date, the official recommendation by the medical field is to wear the lap belt "below your belly, touching your thighs, and low and snug on your hip bones."
But that isn't enough to keep your baby safe. Several independent studies have found that in an accident, the lap belt will still cause injury to the fetus, even if the mother is not injured at all.