arivalen
arivalen
17-01-2019
Biology
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stage that begins with fertilization
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rainbow1748
rainbow1748
18-01-2019
Development of the embryo begins at stage 1 when sperm fertilizes an oocyte and together they form a zygote. Human development begins after the union of male and female gametes or germ cells during a process known as fertilization (Conception).
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