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Close up view of pronuclei showing nucleolar distribution

LM of a series of close-up views of pronuclei in stage 1b embryos in vitro showing nucleolar distribution.

c) Both pronuclei have aligned nucleoli.

From: Veeck and Zaninovic´, 2003. Reproduced with permission of the publisher, Taylor & Francis Group.

Keywords: nucleolus, pronucleus

Source: The Virtual Human Embryo.