Schaaps J P, Lambotte R
Service de Gynécologie et d'Obstétrique de l'Université de Liège.
Bull Mem Acad R Med Belg. 1994;149(3-4):157-60; discussion 160-1.
In the past, the intervillous space of the human placenta has been studied on samples provided by spontaneous abortions. Using the endocavitary ultrasonography and the chorionoscopy in normal pregnancies, the intervillous space during the first trimester has been observed as filled by a plasmatic fraction cell free of the maternal blood. During the first trimester, the human placenta doesn't have its theoretical functional specificities.
过去，人类胎盘的绒毛间隙是通过自然流产提供的样本进行研究的。在正常妊娠中，利用腔内超声和绒毛膜镜检查，观察到孕早期的绒毛间隙充满了不含母体血细胞的血浆成分。在孕早期，人类胎盘并不具备其理论上的功能特性。
