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Wax models showing the external appearance of early human embryos, between 3-8 weeks of pregnancy

@MKS-a

Ziegler wax models showing the external form of the embryo between weeks 3 to 8 of pregnancy, first made in the 1850s under the direction of Alexander Ecker This is a series of 5 models of which we have all 5. The models magnify 8-9 times Model 1: Carnegie stage 16 (approx. 37 post-ovulatory days), early limb bud stage Model 2: Carnegie stage 17 (approx. 41 post-ovulatory days), embryo with paddle-shaped limbs Model 3: Carnegie stage 18/19 (approx. 44-47 post-ovulatory days), embryo with early evidence of digita indentation in the forelimbs Model 4: Carnegie stage 20 (approx. 50/51 post-ovulatory days), embryo with deeper digital indentations Model 5: Carnegie stage 21 (approx. 52 post-ovulatory days), embryo with more advanced evidence digit formation

Nineteenth century