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EMBRYONIC DEVELOPMENT & STEM CELL COMPENDIUM
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LifeMap Discovery

Watch the introductory video to learn more about our database of embryonic development for stem cell research and regenerative medicine

All in Vivo Cells > Cell Card
Ovary
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Ovigerous Cord
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XX Germ Cells (OvC)


Ovr.OvC.XXGCs
XX germ cells continue to divide and then enter meiosis at E12.5. Subsequently, the female germ cells arrest at the diplotene stage of meiosis I and do not resume meiosis until postnatally, during ovarian folliculogenesis.

Before formation of an ovarian follicle, oocytes are present within germ cell clusters, also referred to as germ cell cysts or nests. Primordial follicle formation occurs when oocytes that survive the process of germ cell cluster breakdown are individually surrounded with squamous pre-granulosa cells. 
E12.5 - E13.5
Germ Cells, Female Gametocytes
XX Germ Cells
Multiple Ancestors Single Ancestor No Descendants Develops from Part of Parent