Most twin pregnancies average about 35 weeks, which means they’re pretty well cooked by the time they’re here. (For triplets, the mark’s a little shorter, usually about 33 weeks; quads are 29.) Although most premature babies receive an excellent prognosis, it’s natural to worry about going early. Experts say you can start to breathe a little easier past the 32-week mark, since by then the lungs and other key organs are fully developed. And those who make it to the 37-week mark are actually considered full term.
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