mention the diffrent stage of sexual reprduction
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first when the ovum of female and sperm of a male get fussed together ,then after one week it forms a zygote .
which is only one cell then it become 2 celled is also known as cleavage formation after that 4 celled then 8 celled then few celled ball is known as morula then blastocyst then implantation of blastocyst attached itself to urtrine wall .
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