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在国内外文献中只发现人足月胎儿胎盘的直径、厚度、重量的测量数据及脐带的直径、长度、附着在胎盘上的位置的观测资料。还没有发现过关于不同胎龄(月)男性及女性胎儿胎盘的直径、厚度、重量的测量数据及脐带的直径、长度、附着在胎盘上的位置的观测资料。为了填补人体胚胎学的这个空白,并从胎龄和胎儿胎盘、脐带生长发育的相互关系中找出其规律性,为提高人体胚胎学的教学质量及科研水平奠
In domestic and foreign literature only found in full-term human placenta fetal diameter, thickness, weight measurement data and the umbilical cord diameter, length, attached to the placenta on the position of the observed data. No data have been found on measurements of diameter, thickness, and weight of fetal placenta of different gestational age (months) and the diameter, length of the umbilical cord, and the location of attachment on the placenta. In order to fill this gap in human embryology, and from the gestational age and fetal placenta, umbilical cord growth and development of the relationship between the regularity to find out, in order to improve the quality of human embryology teaching and research lay