failure of mammary gland growth during pregnancy 2013-08-10T18:24:43Z MP:0012074 MPheno.ontology arrest, or failure ti initiate the extensive and rapid branching of the mammary ducts, expansion of mammary epithelium in the stroma between the ducts with or without abnormalities in nipple maturation in preparation for lactation arrested mammary gland growth during pregnancy csmith impaired mammary gland growth during pregnancy