Cheung A, Wan M, Collins R J
Department of Pathology, University of Hong Kong.
Aust N Z J Obstet Gynaecol. 1990 May;30(2):134-6. doi: 10.1111/j.1479-828x.1990.tb03244.x.
The prenatal identification of various types of placentation is important for the antenatal management of twin pregnancies. Such classification can be achieved with the use of ultrasound examination. In 32 cases of twin pregnancy the intervening septum was classified as either a thick (dichorionic) or thin (monochorionic) type. Macroscopic and microscopic examination of the placenta after delivery confirmed the ultrasound diagnosis in 24 of the 30 cases, an accuracy of 80%.
产前识别各种胎盘类型对于双胎妊娠的产前管理很重要。这种分类可通过超声检查来实现。在32例双胎妊娠中，中间隔被分类为厚（双绒毛膜）或薄（单绒毛膜）类型。分娩后对胎盘进行的宏观和微观检查证实，30例中有24例超声诊断正确，准确率为80%。
