Posted by Bob on Thursday, October 4, 2007 at 12:06pm.
This is a question that needs to be answered by
a) your parents
b) your teacher
c) your textbook
The male testes produce about 500 milion sperm a day. The female ovaries produce about one egg a month. Semen ejaculated during intercourse typically contains 150-500 million sperm. If one of these sperm penetrates the egg, fertilization occurs, and the zygote (fertilized egg) starts to grow. It implants itself in the lining of the uterus to receive nutrients from the mother. It develops into an embryo. After 8 weeks, it is called a fetus.
I hope this helps. Thanks for asking.
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