在双绒毛膜双胎妊娠中，如果其中一个胎儿在26周仅重320克，发生宫内死亡风险很高时，我们通常会建议推迟产妇的分娩时间。

In a dichorionic pregnancy, if a co-twin weighs 320 g at 26 weeks and is at high risk of in utero death, we typically would advise the parents to delay delivery.

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每20个孕妇中有1个发生妊娠糖尿病，以往认为二甲双胍可以影响胎儿，由于该药可以穿过胎盘。

So-called gestational diabetes surfaces in one out of every 20 pregnant women, and there has been concern that metformin might affect a fetus because the drug can cross the placenta.

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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；

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

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