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The timing and sequence of events in the development of the limbs in the human embryo

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A documented scheme of the early development of the human limbs is presented. It is based on (1) published and unpublished personal observations, and (2) reports of other workers who personally studied staged human embryos. The necessity of studying staged embryos in determining the precise sequence of developmental events is stressed.

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Supported by research programme project grant No. HD-08658, Institute of Child Health and Human Development, National Institutes of Health (U.S.A.).

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O'Rahilly, R., Gardner, E. The timing and sequence of events in the development of the limbs in the human embryo. Anat Embryol 148, 1–23 (1975). https://doi.org/10.1007/BF00315559

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