You’re about six times as likely to deliver before your due date. Why are so many twins, triplets, and other multiples born early? Think of it this way: Your uterus is a pretty amazing place, but even the womb has its limits. The more baby (plus fluids, plus placenta) in there, the more distended it can become, which means you have a higher chance of breaking your water, developing preterm contractions, or having your cervix dilate.
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