"Elliptical Machine. The elliptical machine is a great gym equipment choice during pregnancy. The reduced pressure on the joints is helpful for already ailing joints because of the added weight of pregnancy. The elliptical machine can provide a great cardio and light strength workout for women during pregnancy."
As long as you don't overdo it, you should be fine on the machine. Keep in mind that your balance is not as good during pregnqancy so keep it to a brisk walk or slower rather than a run to lessen the chances of a fall.