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1. Oxford American Dictionary

   dystocia

   • IPA[diˈstōSH(ē)ə]

   美式

   • n.
     difficult birth, typically caused by a large or awkwardly positioned fetus, by smallness of the maternal pelvis, or by failure of the uterus and cervix to contract and expand normally

   • noun: dystocia

2. • 釋義

   n.

   名詞

   • 1. difficult birth, typically caused by a large or awkwardly positioned fetus, by smallness of the maternal pelvis, or by failure of the uterus and cervix to contract and expand normally the incidence of dystocia or difficult calvings