Complex sentence: As the coelomic epithelium is confronted with XX chromosomes, the cells will differentiate into granulosa cells, which will not produce antimüllerian hormone and thus allow the development of the Müllerian duct.
Split into simpler sentences: As the coelomic epithelium is confronted with XX chromosomes. They will differentiate into granulosa cells, which will not produce antimüllerian hormone and thus allow the development of the Müllerian duct.