THE ROLES OF OLIGOMENORRHEA AND FETAL CHROMOSOMAL-ABNORMALITIES IN SPONTANEOUS-ABORTIONS

The pathogenesis of spontaneous abortions, other than fetal chromosoma l abnormalities, is not fully understood, We examined the incidence of oligomenorrhoea in relation to fetal chromosomal analyses and ultraso nographic examination in women who aborted spontaneously, Tile data de monstrated that the incidence of oligomenorrhoea was higher in women w ith normal fetal karyotyped abortions, especially normal karyotyped an embryonic pregnancies, than in those with abnormal karyotyped abortion s (34.0 versus 12.5%, P < 0.01), Furthermore, the incidence of oligome norrhoea was inversely correlated with fetal size exclusively in abort ions with normal fetal karyotypes. It is suggested that oligomenorrhoe a, i.e. delayed ovulation, itself may be closely associated with spora dic spontaneous abortion.