Yeah, 3D Movies are really wonderful; however, I think you had better not have the pregnant women, like your wife, to wear the 3D glasses. As we all know, viewing movies with 3D glasses may also cause motion sickness, disorientation, eye strain, especially the pregnant women. You know if the ready mother has the motion sickness, then it is really danger for both mother and children, and the worst result is abortion. As to the eye strain, maybe you can sense it after the 3D movies. While watching movies with 3D glasses, your brain and eyes improperly focus on an image (appeared in the movies) enabling the 3D image appeared in your eyes. This manipulation will have you have eye strain, after that, you will experience headaches and blurred vision. Apart from the bad effects on the mother, there will be some effects on your children, like having the risk of having epilepsy.