title: Sex ratio in ectopic gestations.
abstract: Sex assignment was determined in 80 cases of ectopic pregnancy. Tissue sections of chorionic villi were stained with quinacrine for demonstration of either X or Y chromatin. Forty-one (51.2%) were X-chromatin (Barr body)-positive; 38 (47.5%) were Y-chromatin-positive, and 1 (1.3%) was Barr- and Y-positive in the same nuclei. The sex ratio of ectopic gestations in this study was 0.92 male to 1 female. Based on these data, there appears to be no predilection for ectopic implantation by either sex.
mesh_terms: D002824:Chorionic Villi / Q000648:ultrastructure; D005260:Female; D006801:Humans; D011247:Pregnancy; D011271:Pregnancy, Ectopic; D012728:Sex Chromatin; D012744:Sex Ratio