Horse shoe kidney is due to prevention of ascent by?
Horseshoe kidney: the lower poles of the two kidneys may be fused. The connecting isthmus may lie either in front of or behind, the aoa and inferior vena cava. Ahorse shoe kidney doesn't ascent higher than the level of inferior mesenteric aery as the latter prevent its higher ascent Ref: Human embryology Inderbir Singh Tenth edition Page 288
Superior mesenteric aery
Inferior mesenteric aery
Supernumerary aeries
Ureters
General anatomy