一种新的孕早期诊断母儿血型不合方法—绒毛血型物质测定

ABO系统母儿血型不合是我国引起新生儿溶血病的主要原因。为了在孕早期对可疑母儿血型不合的胎儿血型作出产前诊断,我们用吸收放散法测定了40例孕6～12周绒毛组织的血型物质,同时测定了其父母血型,40例标本的血型物质与其父母血型按遗传规律所可有的子女的血型相符。20例标本曾重复测定,两次测定结果均一致。这一方法提示可经宫颈吸取微量绒毛测定血型物质以鉴定胎儿ABO血型,为孕早期产前诊断母儿血型不合提供了一种新的途径。

DETERMINATION OF BLOOD GROUP SUBSTANCES OF CHORIONIC VILLI AS DIAGNOSTIC METHOD FOR MOTHER-FETUS BLOOD GROUP INCOMPATIBILITY IN EARLY PREGNANCY

Mother-Fetus ABO blood group incompatibility is one of the most common causes of hemolytic disease of newborns in China. To identify the blood group of the fetus in case of suspected mother-fetus blood group incompatibility in the first trimester of pregnancy, the author determined blood group substance (BGS) in 40 chorionic villi samples taken by the absorption-elution procedure during 6 to 12 weeks of gestation, with a simultaneous parental blood group determination as control. The BGS detected in those specimens were all in accordance with those of the blood groups of their coriesponding parents. Among the 40 samples of chorionic villi, 20 were redetermined, and the results were the same. This demonstrates the feasibility of the procedure to identify the fetal blood groups by the determination of BGS in the chorionic villi by transcervical aspiration. The study presents, apparently, a new and simple diagnostic method for detecting mother-fetus blood incompatibility in early pregnancy, thas giviing a prospectively preventive study on those types of blood group incompatibility.