Our expert says:
this can unfortunately happen to any baby and sometimes it only happen at the birth, so one can't see it on sonar in time. preterm babies survive from as early as 24 weeks, but the possible complications is bigger the earlier they are born. The story about your arms is an old wives tale - no truth in that. If you baby do arrive preterm have a look on the little steps weblink on the top of the page and look for the book: Prematurity - Adjusting your Dream.
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