LM of a close up view of pronuclei in a stage 1b embryo in vitro showing good nucleoli distribution. The nucleoli are nearly equal in number and size and are closely aligned at the pronuclear junction.
From: Veeck and Zaninovic´, 2003. Reproduced with permission of the publisher, Taylor & Francis Group.
Keywords: nucleolus, pronuclear junction, pronucleus, stage 1b embryo
Source: The Virtual Human Embryo.