多胎儿系未成熟儿,未成熟儿佝偻病的发病情况,取决于未成熟的程度和有关的誘因。虽然据Ethel C.4 Dunham氏調Folie和他的同工者,曾报告177例婴儿的屍捡发现佝偻病的发病率从1个月后上升到第七个月时达90.7％,以后开始下降,至2岁时发病率为60.3％。至于我国有关这方面的报导不多。为了做好佝偻病的防治工作,我們观察了43名多胎儿,并与同数成熟儿进行了对比,茲分述如下: Multiple fetuses Department of immature children, immature rickets, the incidence depends on the degree of immature and related incentives. Although the incidence of rickets in 177 infants was reported to have risen from one month to 90.7% at the seventh month according to Ethel C.4 Dunham’s Folke and his co-workers, The incidence was 60.3% at 2 years of age. As for our country’s coverage of this area is limited. In order to do a good job in the prevention and treatment of rickets, we observed 43 multiple fetuses and compared them with the same number of mature children. The points are as follows: