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1 It is reported that amyoplasia comprises 43% of reported cases. 2  No racial tendency is present. 3  Males are more affected in X-linked recessive disorders; otherwise, females and males are equally affected.  Arthrogryposis is detected at birth or in utero using ultrasound.
Quick Answer. Mitosis, or normal cell division, and the deposition of extracellular materials are the ways that an embryo grows. However, in the early stages of development, the cell undergoes mitosis without growing. The egg cell is much larger than normal body cells, and so it can divide many times before growing.