The relationship of development, number and distribution of two types of mast cells with development of human fetal stomach fundus was investigated by light microscopy in 40 cases of human fetal stomach samples. And the influence of FA fixation on mast cell staining was also researched. 观察了40例不同胎龄胎儿胃底部两型肥大细胞发育、数量及分布和胃底部发育的关系,并探讨了甲醛固定对CTMC和MMC染色效应的影响。