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What does the Penis do?
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What is ejaculation?
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What happens on day 5 of menstrual cycle?
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What is adolescence?
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Where does the pollen nucleus move down?
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What is a contraceptive Pill?
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What are some changes in Femal bodies?
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What does the egg travel through?
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What do the testes do?
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What happens on day 1 of menstrual cycle?
