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羊水中的沉淀物是胎儿的分泌物和脱落细胞,由这些细胞可测知胎儿的性别。深入研究细胞染色体分带,也可检出胎儿的某些遗传性疾病。此外,国外有人用羊水中细胞预测胎儿的ABO血型,日本久永幸生等报道了用柯姆斯等介绍的混合凝集法,其预测结果,符合率达100％。作者还提示,若羊水中混有母体血细胞或胎儿的脱落细胞大量死亡时,可造成血型误差。这一研究工作,可用于在孕期中鉴定胎儿血型。在曾有ABO新生儿溶血病史的产妇,特别是O型产妇的羊水中,预知产妇与胎儿血型异同情况,以便采取更有效的医疗措施,并预知宫内输血或换血所用的血液的类型。在法医学上用ABO血型,在判断亲生子的争执上可供参考。
Amniotic fluid sediment is the secretion of the fetus and exfoliated cells from which the fetus’s sex can be determined. In-depth study of cell chromosome zoning, but also detect some of the genetic diseases of the fetus. In addition, some people abroad with amniotic fluid cells predict fetal ABO blood type, such as Japan’s Kimio Yoshihisa, reported the use of hybrid agglutination method introduced by Collins et al., Its prediction results, in line with the rate of 100%. The authors also suggest that if amniotic fluid mixed with maternal blood cells or fetal exfoliated cells died in large numbers, can cause blood group error. This research can be used to identify fetal blood type during pregnancy. Maternal in the history of hemolytic disease with ABO, especially the O-type maternal amniotic fluid, predict the maternal and fetal blood type differences and similarities in order to take more effective medical measures and predict the type of blood for intrauterine blood transfusion or transfusion. In forensic ABO blood type, in determining the dispute on the biological son for reference.