Objective (1)To study the change of fetal middle cerebral artery pulsatility index(PIMCA) in twin pregnancy;

目的探讨正常双胎妊娠期间胎儿大脑中动脉搏动指数的变化；

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Objective (1)To study the change of fetal middle cerebral artery pulsatility index(PIMCA) in twin pregnancy;

目的探讨正常双胎妊娠期间胎儿大脑中动脉搏动指数的变化；

youdao