From August, 1984 to February, 1985, We kept a synchronous observation of 92mothers and their babies on the relationship of iron status between them. The 92 pregnantwomen, of whom the gestational periods were not longer than 36 weeks, were divided rando-mly into wo groups: a medication group and a control group. For all, Hb, Hct, FEPand SF were tested. In the 4th week after labor, Hb, Hct and SF of the mothers ofthe medication group were higher than that of the control group (P