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据估计,所有人类怀孕中,约有75%是自发流产。虽然这数据尚待证实,但是我们知道,在所有已可辨认的妊娠中,至少有15%以自发流产告终。对于个别夫妇来说,流产是一件不幸的事,然而,流产胎儿有很大的比例是染色体异常,因此,自发流产可以认为是一个重要的选择机制,通过自发流产的途径,在妊娠第28个星期以前,就把95%的“细胞遗传学误差”排除了。自发流产的早期染色体研究,是用非显带染色分析方法进行的,用这个方法,在人
It is estimated that about 75% of all human pregnancies are spontaneous abortions. Although this data is yet to be confirmed, we know that at least 15% of all identifiable pregnancies end in spontaneous abortion. Abortion is an unlucky event for some couples. However, a large percentage of miscarried fetuses have chromosomal abnormalities. Therefore, spontaneous abortion can be considered as an important mechanism of choice. Through spontaneous abortion, A week ago, 95% of the “cytogenetic errors” were ruled out. Early chromosomal studies of spontaneous abortion were carried out using non-banding staining methods. Using this method,