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么叫围产期？关于这个概念的定义，目前国际上尚未统一，常用的有以下四种：围产期Ⅰ：妇女孕满２８周至新生儿出生７天之内；围产期Ⅱ：妇女孕满２０周至新生儿出生后２８天之内；围产期Ⅲ：妇女孕满２８周至新生儿出生后２８天之内；围产期Ⅳ：指从胚胎形成至新生儿出生...
What is perinatal? The definition of this concept, the international community has not yet been unified, commonly used in the following four: perinatal Ⅰ: women pregnant 28 weeks to newborns within 7 days of birth; perinatal Ⅱ: pregnant women 20 weeks until the birth of newborns Within 28 days after the onset of pregnancy; Perinatal period III: 28 weeks after the woman has been pregnant for 28 weeks to within 28 days after birth; Perinatal IV: refers to the birth from the embryo to the newborn ...