abnormal embryonic tissue morphology abnormal gonadal ridge morphology 2011-10-31T04:26:50Z MP:0011411 MPheno.ontology abnormal genital cord morphology abnormal genital ridge morphology any structural anomaly of the elevation of thickened mesothelium and underlying mesenchyme found on the ventromedial border of the embryonic mesonephros in which the primordial germ cells become embedded, establishing it as the primordium of the testis or ovary csmith