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Term
What Is
Morula?
The morula is a stage of post-fertilization development when a fertilized egg that is known as a single-celled zygote, transitions to a mass composed of around 10-30 cells.
During in vitro fertilization (IVF), the morula phase typically occurs on day 4 of development post-fertilization. The morula phase is the final phase prior to blastocyst development.