Tydén O, Bergström S, Nilsson B A
Br J Obstet Gynaecol. 1981 Mar;88(3):278-86. doi: 10.1111/j.1471-0528.1981.tb00982.x.
Amniotic fluid cells provide important information about the fetus. Studies of the surface ultrastructure of such cells identified four cell populations in mid-gestational fluids. A parallel study of tissue surfaces in contact with or communicating with the amniotic fluid showed that some tissues made no contribution to the cell populations, while others contributed extensively. Two principal cell shedding mechanisms were found in mid-trimester--exfoliation of whole cells and detachment of cellular fragments. The latter mechanism was observed from skin and umbilical cords during a limited period in mid-pregnancy. The majority of cells were derived from exfoliation of squamous epithelia.
羊水细胞可提供有关胎儿的重要信息。对这类细胞表面超微结构的研究在妊娠中期羊水中识别出了四种细胞群。一项对与羊水接触或相通的组织表面进行的平行研究表明，一些组织对这些细胞群没有贡献，而其他组织则有大量贡献。在妊娠中期发现了两种主要的细胞脱落机制——完整细胞的脱落和细胞碎片的分离。后一种机制在妊娠中期的一段有限时间内可在皮肤和脐带中观察到。大多数细胞来源于鳞状上皮的脱落。
