Continuity: When Schwarzenegger's urine is tested for pregnancy, the colour of the contents of the vial does not stay the same for two consecutive shots.

Other: During the ride in the car, DeVito talked to another doctor at the hospital and stated that he only wanted three people in the room during the delivering of the baby. But when they get there, there are five people in the room, yet nobody reacts to that.

Continuity: While chasing Alex out of the hospital, Diana knocks into a man who is on roller blades and he falls over. Yet in all shots afterward he is not on the floor and we never see him get up.

Audio problem: There is a scene in the lab where Arnie is explaining his pregnancy to Emma. The shot cuts to a side-on, rear shot of Arnie and it is very clear his mouth or jaw isn't moving and yet you can hear him talking.