One of of the pair of folds derived from the cloacal folds which give rise to a portion of the external genitalia; in male embryos they close over the urethral plate and fuse to form the spongy (penile) urethra and ventral aspect of the penis, not including the glans; failure of fusion of the urethral folds leads to hypospadias; in female embryos they fuse only anterior to the anus and form the labia minora[MP].

urethral fold, urogenital fold

uberon

urogenital ridge

UBERON:0004876

http://purl.obolibrary.org/obo/uberon.owl, http://purl.obolibrary.org/obo/cl.owl

Less commonly, urogenital fold refers to the fold in the mesonephros which is the precursor of e.g. the suspensory ligament of the ovary. This is the case in older versions of Gray's anatomy[WP]

• embryonic urethral groove
• gonadal ridge
• nephrogenic cord
• penis