目的观察孕尿碱性磷酸酶（ALP）及其胎盘型同工酶（PALP）随孕周的变化规律。
Objective To study on changes regulation of ALP and PALP in urine of the pregnant women during various gestational peiods.
本组病例中未遇到低置型前置胎盘。
牛属于子叶型胎盘，这种胎盘的结构特点和饲养管理的不当，常常导致奶牛胎衣不下发生，给乳牛业的生产繁殖带来极大损失。
The structure of placenta and unsuitable raising management often lead to retention of the afterbirth which it brings to the greatest loss of the reproduction of cow industry.
结论EPS反应属于中间型滋养细胞为主的妊娠滋养细胞疾病，可能为胎盘部位滋养细胞肿瘤的前期病变。
Conclusions EPS is a kind of gestational trophoblastic disease primarily involving IT. It may be a preneoplastic lesion of placental site trophoblastic tumor (PSTT).
目的：研究胎盘种植部位中间型滋养细胞病变的发病机理和病理组织学特征，探讨有效的治疗方法。
Objective: to study the pathogenesis, pathological features of placental site intermediate trophoblast disease and to discuss the method of efficient treatment.
结论降低剖宫产率是减少凶险型前置胎盘发生的关键。
Conclusion The key point of reducing the incidence of pernicious placenta praevia is to step down the rate of cesarean section.
术中出血量在前置胎盘中央型患者A组较B组显著增加（P< 0 .0 5） ；
The amount of hemorrhage during operation in group A(central placenta previa or placenta attached to the anterior and side walls of uterus)was distinctly greater than in group B(P<0.05).
术中出血量在前置胎盘中央型患者A组较B组显著增加（P< 0 .0 5） ；
The amount of hemorrhage during operation in group A(central placenta previa or placenta attached to the anterior and side walls of uterus)was distinctly greater than in group B(P<0.05).
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