Archive image from page 44 of The development of the human. The development of the human body : a manual of human embryology . developmentofhum00mcmu Year: 1914 Fig. 16.—Six Stages in the Process of Fertilization of the Ovum of a Mouse. After the first stage figured it is impossible to determine which of the two nuclei represents the male or female pronucleus, ek, Female pronucleus; rkl and rk2, polar globules; spk, male pronucleus.—(Sobotia.) 3

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