Carnegie Stage 13 Definition

Age is approximately 28 postovulatory days

Length is approximately 4-6 mm

External Features Include: all four limb buds are usually visible; otic vesicle is closed; lens disc is generally not indented.

 

(O'Rahilly R and Muller F [1987] Developmental Stages in Human Embryos. Carnegie Institute, Washington, Publication no. 637)

 

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