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jek_recluse [69]
3 years ago
10

Stage that begins with fertilization

Biology
1 answer:
QveST [7]3 years ago
6 0
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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