Early signs of a twin pregnancy include severe morning sickness, quick weight gain, and more breast tenderness. You may also notice an increased appetite or extreme fatigue. Plus, those who have a twin pregnancy may begin showing sooner. But the only way to confirm a twin pregnancy is with an ultrasound done at your doctor's office, typically during the first trimester. Your doctor may also be able to confirm if you're having fraternal or identical twins, but a DNA test can tell you for sure. Click to Learn More