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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.

b) The nucleoli are aligned in the pronucleus on the right but scattered in the pronucleus on the left.

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

Keywords: nucleolus, pronucleus, stage 1b embryo

Source: The Virtual Human Embryo.