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The first part of reproduction begins with a process called intercourse. During intercourse the male's erect penis is placed into the woman's vagina. After a while the male ejaculates, releasing many millions of sperm cells.

From the many millions, a single sperm cell combines with the female's egg cell to create what is called a zygote. The zygote starts splitting itself into more and more cells, which then spread into different parts of the body. All this happens inside the woman's uterus.

After nine months of pregnancy, the mother gives birth to the baby through the vagina.

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15y ago

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