Dantzer V
Acta Anat (Basel). 1984;118(2):96-106. doi: 10.1159/000145827.
The three-dimensional development of the separated parts of the porcine placenta from 9 Danish Landrace sows at gestational stages from 20 to 100 days was studied. After cautious separation of the allantochorion and the endometrium in a 1 mM buffered ethylenediaminetetraacetic acid solution, the separated parts were processed for scanning electron microscopy by routine methods. The macroscopic enlargement resulted from primary and secondary circular folds or plicae, which were permanent on the maternal side, whereas they were mainly non-permanent on the fetal side. The areolar placenta and interareolar placenta with formation of permanent microscopic folding on both sides were described. The observations of the separated parts yielded new information on the development of surface enlargement during gestation and revealed a hitherto unknown regular architecture of the endometrium by the formation of parallel primary ridges or rugae with secondary ridges or rugae at their sides subdividing the maternal troughs or fossae. This configuration on the maternal side explains the transformation of the regular chorionic ridges from the 63-day stage into bulbous protrusions at the 100-day stage. Based on these observations the precise terminology used above was proposed.
对9头丹麦长白母猪在妊娠20至100天期间猪胎盘分离部分的三维发育情况进行了研究。在1 mM缓冲乙二胺四乙酸溶液中小心分离尿囊绒毛膜和子宫内膜后，将分离部分按常规方法进行扫描电子显微镜处理。宏观上的增大是由初级和次级圆形褶皱或皱襞引起的，这些褶皱在母体侧是永久性的，而在胎儿侧主要是非永久性的。描述了两侧均形成永久性微观褶皱的乳晕胎盘和乳晕间胎盘。对分离部分的观察产生了关于妊娠期表面增大发育的新信息，并通过形成平行的初级嵴或皱纹以及在其两侧的次级嵴或皱纹将母体沟或凹窝细分，揭示了子宫内膜迄今未知的规则结构。母体侧的这种结构解释了从63天阶段的规则绒毛膜嵴到100天阶段的球根状突起的转变。基于这些观察结果，提出了上述精确的术语。
