Template:Embryonic Spleen Timeline Table

**Human Embryonic Spleen Development**
Week	Carnegie Stage	Feature
Week 5	14	Carnegie stage 14 to 17 appears as a bulge in the dorsal mesogastrium. Mesothelium pseudostratified.
	15
Week 6	16	Mesothelium (pseudostratified} replaced with high columnar cells and then low columnar cells.
	17	Basement membrane present after this stage.
Week 7	18	Hematopoietic cells detected.
Week 8	20	Spleen is now apparent. Mesenchymal cells differentiated from cells in dorsal mesogastrium. Sinus and hilus formation after this stage.
	23	Arteries and veins parallel entries at this stage.
Human data.^[1] Links: spleen \| Kyoto Collection \| Timeline human development

↑ Endo A, Ueno S, Yamada S, Uwabe C & Takakuwa T. (2015). Morphogenesis of the spleen during the human embryonic period. Anat Rec (Hoboken) , 298, 820-6. PMID: 25403423 DOI.