There are lots of ways that a twin or multiple pregnancy is more taxing than having one baby. But what's the worst thing about it for you? Is it physical discomfort -- double the heartburn, morning sickness, or assorted aches and pains? Is it increased worry about preterm labor or something going wrong? Anxiety about how you'll manage when the babies arrive? Or is it the sheer girth -- gaining extra weight and getting so big in the belly? Click below to vote for your least favorite part of pregnancy (you can vote more than once!):

1. Double the Heartburn
2. Extra Morning Sickness
3. Weight Gain
4. Worry About Preterm Labor
5. Being on Bed Rest
6. Other. (Do tell! Share your thoughts in the message forum.)

Who's winning? Poll results.