Fig. 2. Umbilical branch of the inferior epigastric artery and the vitelline vein remnant in horizontal sections of five fetuses with crown-rump length (CRL)s of 52 to 97 mm. (A–C, E, F) Azan staining. (D, G) H&E staining. (A, B) Fetus with CRL of 52 mm. (C, E) Fetus with CRL of 55 mm. (D) Fetus with CRL of 72 mm. (F) Fetus with CRL of 83 mm. (G) Fetus with CRL of 97 mm. Each panel contains the umbilical branch (artery) of the inferior epigastric artery. The remnant of the vitelline vein (VV) is present in two fetuses (A–C, E). (A–E) High magnification (scale bar in A=1 mm). (F, G) Low magnification (scale bar in F=1 mm). lymph, lymphatic vessels; AL, allantois; RA, rectus abdominis; UA, umbilical artery.
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