[Habitual abortion is more frequent among women with low birth weight].

Information on the birth weight and gestational age at birth was obtained for 79 singleborn women with recurrent miscarriages, 60 of their male partners and, 474 female and 360 male controls. The mean birth weight of the women with recurrent miscarriages was 3265 g which was significantly lower than in female controls (p < 0.025). Of the women in the study group, 10.8% were born preterm compared with 2.9% of the controls (p = 0.01). The mean birth weight of the male partners in the study group did not differ significantly from that of the male controls. It is concluded that there is evidence for a reduced birth weight trait associated with recurrent miscarriages; the trait being manifests itself only in the woman.